51767747772 has 48 divisors (see below), whose sum is σ = 130145450400. Its totient is φ = 15920898048.

The previous prime is 51767747767. The next prime is 51767747791. The reversal of 51767747772 is 27774776715.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251104 + ... + 408152.

It is an arithmetic number, because the mean of its divisors is an integer number (2711363550).

Almost surely, 2^51767747772 is an apocalyptic number.

51767747772 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51767747772 is an abundant number, since it is smaller than the sum of its proper divisors (78377702628).

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

51767747772 is a wasteful number, since it uses less digits than its factorization.

51767747772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159182 (or 159180 counting only the distinct ones).

The product of its digits is 28235760, while the sum is 60.

The spelling of 51767747772 in words is "fifty-one billion, seven hundred sixty-seven million, seven hundred forty-seven thousand, seven hundred seventy-two".