51438415253625 has 40 divisors (see below), whose sum is σ = 95896447063560. Its totient is φ = 27433821463200.

The previous prime is 51438415253579. The next prime is 51438415253651. The reversal of 51438415253625 is 52635251483415.

51438415253625 is a `hidden beast` number, since 5 + 1 + 4 + 3 + 8 + 4 + 1 + 5 + 2 + 5 + 3 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5076990009 + 51433338263616 = 71253^2 + 7171704^2 .

It is not a de Polignac number, because 51438415253625 - 2⁴³ = 42642322231417 is a prime.

It is a super-2 number, since 2×51438415253625² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2540158530 + ... + 2540178779.

It is an arithmetic number, because the mean of its divisors is an integer number (2397411176589).

Almost surely, 2^{51438415253625} is an apocalyptic number.

It is an amenable number.

51438415253625 is a deficient number, since it is larger than the sum of its proper divisors (44458031809935).

51438415253625 is an equidigital number, since it uses as much as digits as its factorization.

51438415253625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080337336 (or 5080337317 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 54.

The spelling of 51438415253625 in words is "fifty-one trillion, four hundred thirty-eight billion, four hundred fifteen million, two hundred fifty-three thousand, six hundred twenty-five".