2156615895 has 16 divisors (see below), whose sum is σ = 3943526400. Its totient is φ = 985881504.

The previous prime is 2156615887. The next prime is 2156615897. The reversal of 2156615895 is 5985166512.

It is not a de Polignac number, because 2156615895 - 2³ = 2156615887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156615897) 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, 10269495 + ... + 10269704.

It is an arithmetic number, because the mean of its divisors is an integer number (246470400).

Almost surely, 2^2156615895 is an apocalyptic number.

2156615895 is a deficient number, since it is larger than the sum of its proper divisors (1786910505).

2156615895 is a wasteful number, since it uses less digits than its factorization.

2156615895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20539214.

The product of its digits is 648000, while the sum is 48.

The square root of 2156615895 is about 46439.3787103144. The cubic root of 2156615895 is about 1291.9853840120.

The spelling of 2156615895 in words is "two billion, one hundred fifty-six million, six hundred fifteen thousand, eight hundred ninety-five".