2156808667596 has 48 divisors (see below), whose sum is σ = 5492398396800. Its totient is φ = 653299816320.

The previous prime is 2156808667579. The next prime is 2156808667709. The reversal of 2156808667596 is 6957668086512.

It is a self number, because there is not a number n which added to its sum of digits gives 2156808667596.

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, 3171121 + ... + 3790728.

It is an arithmetic number, because the mean of its divisors is an integer number (114424966600).

Almost surely, 2^{2156808667596} is an apocalyptic number.

It is an amenable number.

2156808667596 is an abundant number, since it is smaller than the sum of its proper divisors (3335589729204).

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

2156808667596 is a wasteful number, since it uses less digits than its factorization.

2156808667596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964214 (or 6964212 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 69.

The spelling of 2156808667596 in words is "two trillion, one hundred fifty-six billion, eight hundred eight million, six hundred sixty-seven thousand, five hundred ninety-six".