641570232960 has 384 divisors, whose sum is σ = 2318613897600. Its totient is φ = 169511325696.

The previous prime is 641570232923. The next prime is 641570233079. The reversal of 641570232960 is 69232075146.

641570232960 is a `hidden beast` number, since 6 + 41 + 570 + 2 + 32 + 9 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×641570232960² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16932757 + ... + 16970603.

It is an arithmetic number, because the mean of its divisors is an integer number (6038057025).

Almost surely, 2^641570232960 is an apocalyptic number.

641570232960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641570232960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159306948800).

641570232960 is an abundant number, since it is smaller than the sum of its proper divisors (1677043664640).

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

641570232960 is a wasteful number, since it uses less digits than its factorization.

641570232960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37990 (or 37966 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 641570232960 in words is "six hundred forty-one billion, five hundred seventy million, two hundred thirty-two thousand, nine hundred sixty".