51538528412 has 24 divisors (see below), whose sum is σ = 103099145856. Its totient is φ = 22083207408.

The previous prime is 51538528403. The next prime is 51538528469. The reversal of 51538528412 is 21482583515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62618 + ... + 327105.

It is an arithmetic number, because the mean of its divisors is an integer number (4295797744).

Almost surely, 2^51538528412 is an apocalyptic number.

It is an amenable number.

51538528412 is an abundant number, since it is smaller than the sum of its proper divisors (51560617444).

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

51538528412 is a wasteful number, since it uses less digits than its factorization.

51538528412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394457 (or 394455 counting only the distinct ones).

The product of its digits is 384000, while the sum is 44.

The spelling of 51538528412 in words is "fifty-one billion, five hundred thirty-eight million, five hundred twenty-eight thousand, four hundred twelve".