2164120625 has 10 divisors (see below), whose sum is σ = 2704285914. Its totient is φ = 1731296000.

The previous prime is 2164120613. The next prime is 2164120663. The reversal of 2164120625 is 5260214612.

2164120625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 1625137969 + 538982656 = 40313^2 + 23216^2 .

It is not a de Polignac number, because 2164120625 - 2⁸ = 2164120369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1730672 + ... + 1731921.

Almost surely, 2^2164120625 is an apocalyptic number.

2164120625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2164120625 is a deficient number, since it is larger than the sum of its proper divisors (540165289).

2164120625 is an frugal number, since it uses more digits than its factorization.

2164120625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462613 (or 3462598 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2164120625 is about 46520.1098988384. The cubic root of 2164120625 is about 1293.4822934777.

The spelling of 2164120625 in words is "two billion, one hundred sixty-four million, one hundred twenty thousand, six hundred twenty-five".