51907727961 has 8 divisors (see below), whose sum is σ = 76900337760. Its totient is φ = 34605151956.

The previous prime is 51907727957. The next prime is 51907728007. The reversal of 51907727961 is 16972770915.

It is a happy number.

It is not a de Polignac number, because 51907727961 - 2² = 51907727957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51907727898 and 51907727907.

It is not an unprimeable number, because it can be changed into a prime (51907727161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961254195 + ... + 961254248.

It is an arithmetic number, because the mean of its divisors is an integer number (9612542220).

Almost surely, 2^51907727961 is an apocalyptic number.

It is an amenable number.

51907727961 is a deficient number, since it is larger than the sum of its proper divisors (24992609799).

51907727961 is a wasteful number, since it uses less digits than its factorization.

51907727961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922508452 (or 1922508446 counting only the distinct ones).

The product of its (nonzero) digits is 1666980, while the sum is 54.

The spelling of 51907727961 in words is "fifty-one billion, nine hundred seven million, seven hundred twenty-seven thousand, nine hundred sixty-one".