2156013520555 has 16 divisors (see below), whose sum is σ = 2699804724480. Its totient is φ = 1649757418848.

The previous prime is 2156013520499. The next prime is 2156013520589. The reversal of 2156013520555 is 5550253106512.

It is a cyclic number.

It is not a de Polignac number, because 2156013520555 - 2¹⁷ = 2156013389483 is a prime.

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, 2870356 + ... + 3542734.

It is an arithmetic number, because the mean of its divisors is an integer number (168737795280).

Almost surely, 2^{2156013520555} is an apocalyptic number.

2156013520555 is a deficient number, since it is larger than the sum of its proper divisors (543791203925).

2156013520555 is a wasteful number, since it uses less digits than its factorization.

2156013520555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700290.

The product of its (nonzero) digits is 225000, while the sum is 40.

The spelling of 2156013520555 in words is "two trillion, one hundred fifty-six billion, thirteen million, five hundred twenty thousand, five hundred fifty-five".