25365634425 has 72 divisors (see below), whose sum is σ = 46583949984. Its totient is φ = 13186817280.

The previous prime is 25365634423. The next prime is 25365634457. The reversal of 25365634425 is 52443656352.

25365634425 is a `hidden beast` number, since 2 + 5 + 3 + 6 + 5 + 634 + 4 + 2 + 5 = 666.

It is not a de Polignac number, because 25365634425 - 2¹ = 25365634423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (25365634423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5289829 + ... + 5294621.

Almost surely, 2^25365634425 is an apocalyptic number.

25365634425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25365634425 is a deficient number, since it is larger than the sum of its proper divisors (21218315559).

25365634425 is a wasteful number, since it uses less digits than its factorization.

25365634425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5399 (or 5391 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 45.

The spelling of 25365634425 in words is "twenty-five billion, three hundred sixty-five million, six hundred thirty-four thousand, four hundred twenty-five".