25398000057 has 32 divisors (see below), whose sum is σ = 34628897920. Its totient is φ = 16554170880.

The previous prime is 25398000049. The next prime is 25398000073. The reversal of 25398000057 is 75000089352.

It is not a de Polignac number, because 25398000057 - 2³ = 25398000049 is a prime.

It is the 159368-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25397999979 and 25398000024.

It is not an unprimeable number, because it can be changed into a prime (25398000037) by changing a digit.

It is a nontrivial repunit in base 159367.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23758119 + ... + 23759187.

It is an arithmetic number, because the mean of its divisors is an integer number (1082153060).

Almost surely, 2^25398000057 is an apocalyptic number.

It is an amenable number.

25398000057 is a deficient number, since it is larger than the sum of its proper divisors (9230897863).

25398000057 is a wasteful number, since it uses less digits than its factorization.

25398000057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 25398000057 in words is "twenty-five billion, three hundred ninety-eight million, fifty-seven", and thus it is an aban number.