51023125404 has 18 divisors (see below), whose sum is σ = 128975122640. Its totient is φ = 17007708456.

The previous prime is 51023125397. The next prime is 51023125409. The reversal of 51023125404 is 40452132015.

51023125404 is a `hidden beast` number, since 5 + 1 + 0 + 231 + 25 + 404 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023125409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 708654484 + ... + 708654555.

Almost surely, 2^51023125404 is an apocalyptic number.

It is an amenable number.

51023125404 is an abundant number, since it is smaller than the sum of its proper divisors (77951997236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51023125404 is a wasteful number, since it uses less digits than its factorization.

51023125404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417309049 (or 1417309044 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 51023125404 its reverse (40452132015), we get a palindrome (91475257419).

The spelling of 51023125404 in words is "fifty-one billion, twenty-three million, one hundred twenty-five thousand, four hundred four".