2156859363 has 16 divisors (see below), whose sum is σ = 2922502176. Its totient is φ = 1414748160.

The previous prime is 2156859307. The next prime is 2156859373. The reversal of 2156859363 is 3639586512.

It is a Cunningham number, because it is equal to 46442²-1.

It is not a de Polignac number, because 2156859363 - 2¹⁴ = 2156842979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156859373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23223 + ... + 69663.

It is an arithmetic number, because the mean of its divisors is an integer number (182656386).

Almost surely, 2^2156859363 is an apocalyptic number.

2156859363 is a deficient number, since it is larger than the sum of its proper divisors (765642813).

2156859363 is a wasteful number, since it uses less digits than its factorization.

2156859363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46694.

The product of its digits is 1166400, while the sum is 48.

The square root of 2156859363 is about 46441.9999892339. Note that the first 4 decimals coincide. The cubic root of 2156859363 is about 1292.0340011165.

The spelling of 2156859363 in words is "two billion, one hundred fifty-six million, eight hundred fifty-nine thousand, three hundred sixty-three".