6397685556 has 48 divisors (see below), whose sum is σ = 15114363264. Its totient is φ = 2106043776.

The previous prime is 6397685527. The next prime is 6397685561. The reversal of 6397685556 is 6555867936.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6397685556.

It is a congruent number.

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, 454090 + ... + 467966.

It is an arithmetic number, because the mean of its divisors is an integer number (314882568).

Almost surely, 2^6397685556 is an apocalyptic number.

It is an amenable number.

6397685556 is an abundant number, since it is smaller than the sum of its proper divisors (8716677708).

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

6397685556 is a wasteful number, since it uses less digits than its factorization.

6397685556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14360 (or 14358 counting only the distinct ones).

The product of its digits is 40824000, while the sum is 60.

The square root of 6397685556 is about 79985.5334169873. The cubic root of 6397685556 is about 1856.4117002648.

The spelling of 6397685556 in words is "six billion, three hundred ninety-seven million, six hundred eighty-five thousand, five hundred fifty-six".