6557371556 has 12 divisors (see below), whose sum is σ = 11512300800. Its totient is φ = 3268142760.

The previous prime is 6557371547. The next prime is 6557371567. The reversal of 6557371556 is 6551737556.

It is a happy number.

It is a super-2 number, since 2×6557371556² = 85998243446875722272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2634356 + ... + 2636843.

It is an arithmetic number, because the mean of its divisors is an integer number (959358400).

Almost surely, 2^6557371556 is an apocalyptic number.

It is an amenable number.

6557371556 is a deficient number, since it is larger than the sum of its proper divisors (4954929244).

6557371556 is a wasteful number, since it uses less digits than its factorization.

6557371556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271514 (or 5271512 counting only the distinct ones).

The product of its digits is 3307500, while the sum is 50.

The square root of 6557371556 is about 80977.5990999980. The cubic root of 6557371556 is about 1871.7302711342.

The spelling of 6557371556 in words is "six billion, five hundred fifty-seven million, three hundred seventy-one thousand, five hundred fifty-six".