2153644425 has 18 divisors (see below), whose sum is σ = 3857416862. Its totient is φ = 1148610240.

The previous prime is 2153644417. The next prime is 2153644457. The reversal of 2153644425 is 5244463512.

2153644425 is a `hidden beast` number, since 2 + 1 + 5 + 3 + 644 + 4 + 2 + 5 = 666.

2153644425 is digitally balanced in base 6, 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 3 ways, for example, as 457275456 + 1696368969 = 21384^2 + 41187^2 .

It is not a de Polignac number, because 2153644425 - 2³ = 2153644417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2153644425.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4785652 + ... + 4786101.

Almost surely, 2^2153644425 is an apocalyptic number.

2153644425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2153644425 is a deficient number, since it is larger than the sum of its proper divisors (1703772437).

2153644425 is a wasteful number, since it uses less digits than its factorization.

2153644425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571769 (or 9571761 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 2153644425 is about 46407.3746833410. The cubic root of 2153644425 is about 1291.3917285558.

The spelling of 2153644425 in words is "two billion, one hundred fifty-three million, six hundred forty-four thousand, four hundred twenty-five".