25136399361 has 16 divisors (see below), whose sum is σ = 34304726016. Its totient is φ = 16363065936.

The previous prime is 25136399347. The next prime is 25136399363. The reversal of 25136399361 is 16399363152.

It is not a de Polignac number, because 25136399361 - 2⁶ = 25136399297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25136399361.

It is not an unprimeable number, because it can be changed into a prime (25136399363) 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, 440476 + ... + 494258.

It is an arithmetic number, because the mean of its divisors is an integer number (2144045376).

Almost surely, 2^25136399361 is an apocalyptic number.

It is an amenable number.

25136399361 is a deficient number, since it is larger than the sum of its proper divisors (9168326655).

25136399361 is a wasteful number, since it uses less digits than its factorization.

25136399361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57452.

The product of its digits is 787320, while the sum is 48.

The spelling of 25136399361 in words is "twenty-five billion, one hundred thirty-six million, three hundred ninety-nine thousand, three hundred sixty-one".