25507608587 has 2 divisors, whose sum is σ = 25507608588. Its totient is φ = 25507608586.

The previous prime is 25507608583. The next prime is 25507608613. The reversal of 25507608587 is 78580670552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25507608587 - 2² = 25507608583 is a prime.

It is a super-2 number, since 2×25507608587² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25507608583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753804293 + 12753804294.

It is an arithmetic number, because the mean of its divisors is an integer number (12753804294).

Almost surely, 2^25507608587 is an apocalyptic number.

25507608587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25507608587 is an equidigital number, since it uses as much as digits as its factorization.

25507608587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704000, while the sum is 53.

The spelling of 25507608587 in words is "twenty-five billion, five hundred seven million, six hundred eight thousand, five hundred eighty-seven".