641542324461624 has 128 divisors (see below), whose sum is σ = 1823948990899200. Its totient is φ = 208823424122880.

The previous prime is 641542324461617. The next prime is 641542324461749. The reversal of 641542324461624 is 426164423245146.

It is a happy number.

641542324461624 is a `hidden beast` number, since 6 + 4 + 1 + 5 + 4 + 2 + 3 + 2 + 4 + 4 + 6 + 1 + 624 = 666.

641542324461624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641542324461624² (a number of 30 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29782072 + ... + 46583864.

It is an arithmetic number, because the mean of its divisors is an integer number (14249601491400).

Almost surely, 2^{641542324461624} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641542324461624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911974495449600).

641542324461624 is an abundant number, since it is smaller than the sum of its proper divisors (1182406666437576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641542324461624 is a wasteful number, since it uses less digits than its factorization.

641542324461624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16805962 (or 16805952 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 54.

The spelling of 641542324461624 in words is "six hundred forty-one trillion, five hundred forty-two billion, three hundred twenty-four million, four hundred sixty-one thousand, six hundred twenty-four".