2164065525 has 96 divisors (see below), whose sum is σ = 4083488640. Its totient is φ = 1123200000.

The previous prime is 2164065517. The next prime is 2164065539. The reversal of 2164065525 is 5255604612.

2164065525 is a `hidden beast` number, since 2 + 1 + 640 + 6 + 5 + 5 + 2 + 5 = 666.

It is not a de Polignac number, because 2164065525 - 2³ = 2164065517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2164065525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8621650 + ... + 8621900.

It is an arithmetic number, because the mean of its divisors is an integer number (42536340).

Almost surely, 2^2164065525 is an apocalyptic number.

2164065525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2164065525 is a deficient number, since it is larger than the sum of its proper divisors (1919423115).

2164065525 is a wasteful number, since it uses less digits than its factorization.

2164065525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 2164065525 is about 46519.5176780671. The cubic root of 2164065525 is about 1293.4713157348.

The spelling of 2164065525 in words is "two billion, one hundred sixty-four million, sixty-five thousand, five hundred twenty-five".