641658356332 has 48 divisors (see below), whose sum is σ = 1358886025728. Its totient is φ = 258804921600.

The previous prime is 641658356323. The next prime is 641658356399. The reversal of 641658356332 is 233653856146.

It is a self number, because there is not a number n which added to its sum of digits gives 641658356332.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11658823 + ... + 11713729.

It is an arithmetic number, because the mean of its divisors is an integer number (28310125536).

Almost surely, 2^641658356332 is an apocalyptic number.

It is an amenable number.

641658356332 is an abundant number, since it is smaller than the sum of its proper divisors (717227669396).

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

641658356332 is a wasteful number, since it uses less digits than its factorization.

641658356332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79486 (or 79484 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 52.

The spelling of 641658356332 in words is "six hundred forty-one billion, six hundred fifty-eight million, three hundred fifty-six thousand, three hundred thirty-two".