2162505816 has 64 divisors (see below), whose sum is σ = 6268147200. Its totient is φ = 689493024.

The previous prime is 2162505799. The next prime is 2162505823. The reversal of 2162505816 is 6185052612.

2162505816 is a `hidden beast` number, since 21 + 6 + 2 + 50 + 581 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212676 + ... + 222611.

It is an arithmetic number, because the mean of its divisors is an integer number (97939800).

Almost surely, 2^2162505816 is an apocalyptic number.

It is an amenable number.

2162505816 is an abundant number, since it is smaller than the sum of its proper divisors (4105641384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2162505816 is a wasteful number, since it uses less digits than its factorization.

2162505816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435325 (or 435315 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 2162505816 is about 46502.7506283231. The cubic root of 2162505816 is about 1293.1604927799.

The spelling of 2162505816 in words is "two billion, one hundred sixty-two million, five hundred five thousand, eight hundred sixteen".