25402147256425 has 12 divisors (see below), whose sum is σ = 31500888618780. Its totient is φ = 20320281662720.

The previous prime is 25402147256419. The next prime is 25402147256429. The reversal of 25402147256425 is 52465274120452.

It can be written as a sum of positive squares in 6 ways, for example, as 1146246455641 + 24255900800784 = 1070629^2 + 4925028^2 .

It is not a de Polignac number, because 25402147256425 - 2⁹ = 25402147255913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25402147256429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35542660 + ... + 36250309.

It is an arithmetic number, because the mean of its divisors is an integer number (2625074051565).

Almost surely, 2^{25402147256425} is an apocalyptic number.

25402147256425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25402147256425 is a deficient number, since it is larger than the sum of its proper divisors (6098741362355).

25402147256425 is a wasteful number, since it uses less digits than its factorization.

25402147256425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71807132 (or 71807127 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 49.

The spelling of 25402147256425 in words is "twenty-five trillion, four hundred two billion, one hundred forty-seven million, two hundred fifty-six thousand, four hundred twenty-five".