2156275079292 has 96 divisors (see below), whose sum is σ = 5552574289920. Its totient is φ = 648236191680.

The previous prime is 2156275079263. The next prime is 2156275079297. The reversal of 2156275079292 is 2929705726512.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156275079297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132103 + ... + 2080865.

It is an arithmetic number, because the mean of its divisors is an integer number (57839315520).

Almost surely, 2^{2156275079292} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156275079292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2776287144960).

2156275079292 is an abundant number, since it is smaller than the sum of its proper divisors (3396299210628).

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

2156275079292 is a wasteful number, since it uses less digits than its factorization.

2156275079292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949023 (or 1949021 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 2156275079292 in words is "two trillion, one hundred fifty-six billion, two hundred seventy-five million, seventy-nine thousand, two hundred ninety-two".