51113665760 has 48 divisors (see below), whose sum is σ = 121098254256. Its totient is φ = 20387524608.

The previous prime is 51113665747. The next prime is 51113665789. The reversal of 51113665760 is 6756631115.

It is a happy number.

51113665760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51113665760² (a number of 22 digits) contains 22 as substring.

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, 396014 + ... + 508973.

It is an arithmetic number, because the mean of its divisors is an integer number (2522880297).

Almost surely, 2^51113665760 is an apocalyptic number.

It is an amenable number.

51113665760 is an abundant number, since it is smaller than the sum of its proper divisors (69984588496).

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

51113665760 is a wasteful number, since it uses less digits than its factorization.

51113665760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905355 (or 905347 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 51113665760 in words is "fifty-one billion, one hundred thirteen million, six hundred sixty-five thousand, seven hundred sixty".