641578675032 has 96 divisors (see below), whose sum is σ = 1758451172400. Its totient is φ = 211309592832.

The previous prime is 641578675027. The next prime is 641578675039. The reversal of 641578675032 is 230576875146.

641578675032 is a `hidden beast` number, since 6 + 4 + 1 + 5 + 78 + 67 + 503 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 641578675032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641578675039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1864878 + ... + 2181954.

Almost surely, 2^641578675032 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 641578675032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879225586200).

641578675032 is an abundant number, since it is smaller than the sum of its proper divisors (1116872497368).

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

641578675032 is a wasteful number, since it uses less digits than its factorization.

641578675032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317425 (or 317418 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 641578675032 in words is "six hundred forty-one billion, five hundred seventy-eight million, six hundred seventy-five thousand, thirty-two".