6413720556 has 24 divisors (see below), whose sum is σ = 15313380544. Its totient is φ = 2088187920.

The previous prime is 6413720549. The next prime is 6413720561. The reversal of 6413720556 is 6550273146.

It is a super-2 number, since 2×6413720556² = 82271622740913898272, which contains 22 as substring.

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, 6214330 + ... + 6215361.

Almost surely, 2^6413720556 is an apocalyptic number.

It is an amenable number.

6413720556 is an abundant number, since it is smaller than the sum of its proper divisors (8899659988).

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

6413720556 is a wasteful number, since it uses less digits than its factorization.

6413720556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12429741 (or 12429739 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 6413720556 is about 80085.7075638344. The cubic root of 6413720556 is about 1857.9613610167.

The spelling of 6413720556 in words is "six billion, four hundred thirteen million, seven hundred twenty thousand, five hundred fifty-six".