25647470137 has 2 divisors, whose sum is σ = 25647470138. Its totient is φ = 25647470136.

The previous prime is 25647470129. The next prime is 25647470179. The reversal of 25647470137 is 73107474652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25454287936 + 193182201 = 159544^2 + 13899^2 .

It is a cyclic number.

It is not a de Polignac number, because 25647470137 - 2³ = 25647470129 is a prime.

It is not a weakly prime, because it can be changed into another prime (25647470117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12823735068 + 12823735069.

It is an arithmetic number, because the mean of its divisors is an integer number (12823735069).

Almost surely, 2^25647470137 is an apocalyptic number.

It is an amenable number.

25647470137 is a deficient number, since it is larger than the sum of its proper divisors (1).

25647470137 is an equidigital number, since it uses as much as digits as its factorization.

25647470137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 46.

The spelling of 25647470137 in words is "twenty-five billion, six hundred forty-seven million, four hundred seventy thousand, one hundred thirty-seven".