25405401625 has 16 divisors (see below), whose sum is σ = 31725682560. Its totient is φ = 20311666800.

The previous prime is 25405401589. The next prime is 25405401631. The reversal of 25405401625 is 52610450452.

It is not a de Polignac number, because 25405401625 - 2⁹ = 25405401113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140916 + ... + 265834.

It is an arithmetic number, because the mean of its divisors is an integer number (1982855160).

Almost surely, 2^25405401625 is an apocalyptic number.

25405401625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25405401625 is a deficient number, since it is larger than the sum of its proper divisors (6320280935).

25405401625 is a wasteful number, since it uses less digits than its factorization.

25405401625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126561 (or 126551 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 25405401625 in words is "twenty-five billion, four hundred five million, four hundred one thousand, six hundred twenty-five".