641151644 has 24 divisors (see below), whose sum is σ = 1284286080. Its totient is φ = 274354416.

The previous prime is 641151631. The next prime is 641151649. The reversal of 641151644 is 446151146.

641151644 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 2×641151644² = 822150861207805472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641151644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641151649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079 + ... + 35825.

It is an arithmetic number, because the mean of its divisors is an integer number (53511920).

Almost surely, 2^641151644 is an apocalyptic number.

It is an amenable number.

641151644 is an abundant number, since it is smaller than the sum of its proper divisors (643134436).

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

641151644 is a wasteful number, since it uses less digits than its factorization.

641151644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35417 (or 35415 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 641151644 is about 25320.9724141866. The cubic root of 641151644 is about 862.2904708138.

The spelling of 641151644 in words is "six hundred forty-one million, one hundred fifty-one thousand, six hundred forty-four".