641156163503232 has 64 divisors (see below), whose sum is σ = 1834076525420160. Its totient is φ = 197278819537920.

The previous prime is 641156163503111. The next prime is 641156163503299. The reversal of 641156163503232 is 232305361651146.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×641156163503232² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64218360744 + ... + 64218370727.

It is an arithmetic number, because the mean of its divisors is an integer number (28657445709690).

Almost surely, 2^{641156163503232} is an apocalyptic number.

It is an amenable number.

641156163503232 is an abundant number, since it is smaller than the sum of its proper divisors (1192920361916928).

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

641156163503232 is a wasteful number, since it uses less digits than its factorization.

641156163503232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128436731501 (or 128436731489 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 641156163503232 in words is "six hundred forty-one trillion, one hundred fifty-six billion, one hundred sixty-three million, five hundred three thousand, two hundred thirty-two".