2100625965 has 24 divisors (see below), whose sum is σ = 3650875800. Its totient is φ = 1117321344.

The previous prime is 2100625871. The next prime is 2100626057. The reversal of 2100625965 is 5695260012.

2100625965 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 62 + 596 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 163481796 + 1937144169 = 12786^2 + 44013^2 .

It is not a de Polignac number, because 2100625965 - 2⁷ = 2100625837 is a prime.

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, 45790 + ... + 79359.

It is an arithmetic number, because the mean of its divisors is an integer number (152119825).

Almost surely, 2^2100625965 is an apocalyptic number.

It is an amenable number.

2100625965 is a deficient number, since it is larger than the sum of its proper divisors (1550249835).

2100625965 is a wasteful number, since it uses less digits than its factorization.

2100625965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125533 (or 125530 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2100625965 is about 45832.5862787602. The cubic root of 2100625965 is about 1280.7063900833.

Adding to 2100625965 its reverse (5695260012), we get a palindrome (7795885977).

It can be divided in two parts, 21006 and 25965, that added together give a triangular number (46971 = T₃₀₆).

The spelling of 2100625965 in words is "two billion, one hundred million, six hundred twenty-five thousand, nine hundred sixty-five".