2131664895 has 24 divisors (see below), whose sum is σ = 3697835856. Its totient is φ = 1135980288.

The previous prime is 2131664869. The next prime is 2131664917. The reversal of 2131664895 is 5984661312.

2131664895 is a `hidden beast` number, since 2 + 1 + 3 + 166 + 489 + 5 = 666.

It is not a de Polignac number, because 2131664895 - 2⁹ = 2131664383 is a prime.

It is a super-2 number, since 2×2131664895² = 9087990449150722050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2131664895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40104 + ... + 76626.

It is an arithmetic number, because the mean of its divisors is an integer number (154076494).

Almost surely, 2^2131664895 is an apocalyptic number.

2131664895 is a deficient number, since it is larger than the sum of its proper divisors (1566170961).

2131664895 is a wasteful number, since it uses less digits than its factorization.

2131664895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37831 (or 37828 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 2131664895 is about 46169.9566276599. The cubic root of 2131664895 is about 1286.9834962194.

The spelling of 2131664895 in words is "two billion, one hundred thirty-one million, six hundred sixty-four thousand, eight hundred ninety-five".