2156370556 has 24 divisors (see below), whose sum is σ = 3787837200. Its totient is φ = 1074141312.

The previous prime is 2156370539. The next prime is 2156370563. The reversal of 2156370556 is 6550736512.

It is a congruent number.

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, 2055120 + ... + 2056168.

It is an arithmetic number, because the mean of its divisors is an integer number (157826550).

Almost surely, 2^2156370556 is an apocalyptic number.

It is an amenable number.

2156370556 is a deficient number, since it is larger than the sum of its proper divisors (1631466644).

2156370556 is a wasteful number, since it uses less digits than its factorization.

2156370556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 2156370556 is about 46436.7371377447. The cubic root of 2156370556 is about 1291.9363895938.

The spelling of 2156370556 in words is "two billion, one hundred fifty-six million, three hundred seventy thousand, five hundred fifty-six".