2156513234554 has 16 divisors (see below), whose sum is σ = 3713165650368. Its totient is φ = 920148502752.

The previous prime is 2156513234549. The next prime is 2156513234593. The reversal of 2156513234554 is 4554323156512.

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, 339284619 + ... + 339290974.

It is an arithmetic number, because the mean of its divisors is an integer number (232072853148).

Almost surely, 2^{2156513234554} is an apocalyptic number.

2156513234554 is a deficient number, since it is larger than the sum of its proper divisors (1556652415814).

2156513234554 is a wasteful number, since it uses less digits than its factorization.

2156513234554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678575829.

The product of its digits is 2160000, while the sum is 46.

The spelling of 2156513234554 in words is "two trillion, one hundred fifty-six billion, five hundred thirteen million, two hundred thirty-four thousand, five hundred fifty-four".