2156579013 has 8 divisors (see below), whose sum is σ = 3044582208. Its totient is φ = 1353147584.

The previous prime is 2156578993. The next prime is 2156579027. The reversal of 2156579013 is 3109756512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156579013 - 2⁸ = 2156578757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156579093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21142881 + ... + 21142982.

It is an arithmetic number, because the mean of its divisors is an integer number (380572776).

Almost surely, 2^2156579013 is an apocalyptic number.

It is an amenable number.

2156579013 is a deficient number, since it is larger than the sum of its proper divisors (888003195).

2156579013 is a wasteful number, since it uses less digits than its factorization.

2156579013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42285883.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 2156579013 is about 46438.9816102808. The cubic root of 2156579013 is about 1291.9780188808.

The spelling of 2156579013 in words is "two billion, one hundred fifty-six million, five hundred seventy-nine thousand, thirteen".