25427924657 has 2 divisors, whose sum is σ = 25427924658. Its totient is φ = 25427924656.

The previous prime is 25427924617. The next prime is 25427924671. The reversal of 25427924657 is 75642972452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25339545856 + 88378801 = 159184^2 + 9401^2 .

It is a cyclic number.

It is not a de Polignac number, because 25427924657 - 2²⁴ = 25411147441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25427924599 and 25427924608.

It is not a weakly prime, because it can be changed into another prime (25427924617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12713962328 + 12713962329.

It is an arithmetic number, because the mean of its divisors is an integer number (12713962329).

Almost surely, 2^25427924657 is an apocalyptic number.

It is an amenable number.

25427924657 is a deficient number, since it is larger than the sum of its proper divisors (1).

25427924657 is an equidigital number, since it uses as much as digits as its factorization.

25427924657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 53.

The spelling of 25427924657 in words is "twenty-five billion, four hundred twenty-seven million, nine hundred twenty-four thousand, six hundred fifty-seven".