641662325156 has 24 divisors (see below), whose sum is σ = 1182314652960. Its totient is φ = 303866856000.

The previous prime is 641662325147. The next prime is 641662325167. The reversal of 641662325156 is 651523266146.

It is a self number, because there is not a number n which added to its sum of digits gives 641662325156.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792770 + ... + 1382681.

It is an arithmetic number, because the mean of its divisors is an integer number (49263110540).

Almost surely, 2^641662325156 is an apocalyptic number.

It is an amenable number.

641662325156 is a deficient number, since it is larger than the sum of its proper divisors (540652327804).

641662325156 is a wasteful number, since it uses less digits than its factorization.

641662325156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179355 (or 2179353 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 47.

The spelling of 641662325156 in words is "six hundred forty-one billion, six hundred sixty-two million, three hundred twenty-five thousand, one hundred fifty-six".