51520815712 has 48 divisors (see below), whose sum is σ = 102501912240. Its totient is φ = 25489976832.

The previous prime is 51520815691. The next prime is 51520815721. The reversal of 51520815712 is 21751802515.

51520815712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1172898 + ... + 1216030.

It is an arithmetic number, because the mean of its divisors is an integer number (2135456505).

Almost surely, 2^51520815712 is an apocalyptic number.

It is an amenable number.

51520815712 is a deficient number, since it is larger than the sum of its proper divisors (50981096528).

51520815712 is a wasteful number, since it uses less digits than its factorization.

51520815712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43535 (or 43527 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 37.

The spelling of 51520815712 in words is "fifty-one billion, five hundred twenty million, eight hundred fifteen thousand, seven hundred twelve".