25136631523 has 2 divisors, whose sum is σ = 25136631524. Its totient is φ = 25136631522.

The previous prime is 25136631521. The next prime is 25136631671. The reversal of 25136631523 is 32513663152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25136631523 - 2¹ = 25136631521 is a prime.

Together with 25136631521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25136631521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12568315761 + 12568315762.

It is an arithmetic number, because the mean of its divisors is an integer number (12568315762).

Almost surely, 2^25136631523 is an apocalyptic number.

25136631523 is a deficient number, since it is larger than the sum of its proper divisors (1).

25136631523 is an equidigital number, since it uses as much as digits as its factorization.

25136631523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The spelling of 25136631523 in words is "twenty-five billion, one hundred thirty-six million, six hundred thirty-one thousand, five hundred twenty-three".