2156706617155 has 12 divisors (see below), whose sum is σ = 2680368324192. Its totient is φ = 1665869935520.

The previous prime is 2156706617123. The next prime is 2156706617173. The reversal of 2156706617155 is 5517166076512.

It is not a de Polignac number, because 2156706617155 - 2⁵ = 2156706617123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256441291 + ... + 256449700.

It is an arithmetic number, because the mean of its divisors is an integer number (223364027016).

Almost surely, 2^{2156706617155} is an apocalyptic number.

2156706617155 is a deficient number, since it is larger than the sum of its proper divisors (523661707037).

2156706617155 is an equidigital number, since it uses as much as digits as its factorization.

2156706617155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512891054 (or 512891025 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 2156706617155 in words is "two trillion, one hundred fifty-six billion, seven hundred six million, six hundred seventeen thousand, one hundred fifty-five".