253638012385 has 16 divisors (see below), whose sum is σ = 318422990592. Its totient is φ = 193749424000.

The previous prime is 253638012359. The next prime is 253638012389. The reversal of 253638012385 is 583210836352.

It is not a de Polignac number, because 253638012385 - 2⁹ = 253638011873 is a prime.

It is a super-2 number, since 2×253638012385² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253638012389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13152691 + ... + 13171960.

It is an arithmetic number, because the mean of its divisors is an integer number (19901436912).

Almost surely, 2^253638012385 is an apocalyptic number.

It is an amenable number.

253638012385 is a deficient number, since it is larger than the sum of its proper divisors (64784978207).

253638012385 is a wasteful number, since it uses less digits than its factorization.

253638012385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26324744.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 253638012385 in words is "two hundred fifty-three billion, six hundred thirty-eight million, twelve thousand, three hundred eighty-five".