25420125137 has 16 divisors (see below), whose sum is σ = 29196676800. Its totient is φ = 21888354240.

The previous prime is 25420125127. The next prime is 25420125139. The reversal of 25420125137 is 73152102452.

It is a cyclic number.

It is not a de Polignac number, because 25420125137 - 2⁸ = 25420124881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25420125139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1325783 + ... + 1344819.

It is an arithmetic number, because the mean of its divisors is an integer number (1824792300).

Almost surely, 2^25420125137 is an apocalyptic number.

It is an amenable number.

25420125137 is a deficient number, since it is larger than the sum of its proper divisors (3776551663).

25420125137 is a wasteful number, since it uses less digits than its factorization.

25420125137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25456.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 25420125137 its reverse (73152102452), we get a palindrome (98572227589).

The spelling of 25420125137 in words is "twenty-five billion, four hundred twenty million, one hundred twenty-five thousand, one hundred thirty-seven".