2156859364 has 27 divisors (see below), whose sum is σ = 4150801123. Its totient is φ = 979926200.

The previous prime is 2156859307. The next prime is 2156859373. The reversal of 2156859364 is 4639586512.

The square root of 2156859364 is 46442.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1020669 + ... + 1022779.

Almost surely, 2^2156859364 is an apocalyptic number.

2156859364 is the 46442-nd square number.

It is an amenable number.

2156859364 is a deficient number, since it is larger than the sum of its proper divisors (1993941759).

2156859364 is an equidigital number, since it uses as much as digits as its factorization.

2156859364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 2124 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 49.

The cubic root of 2156859364 is about 1292.0340013161.

Multiplying 2156859364 by its sum of digits (49), we get a square (105686108836 = 325094²).

The spelling of 2156859364 in words is "two billion, one hundred fifty-six million, eight hundred fifty-nine thousand, three hundred sixty-four".