51536965797 has 24 divisors (see below), whose sum is σ = 77266780864. Its totient is φ = 34327991808.

The previous prime is 51536965769. The next prime is 51536965801. The reversal of 51536965797 is 79756963515.

51536965797 is a `hidden beast` number, since 5 + 1 + 53 + 6 + 9 + 6 + 579 + 7 = 666.

It is not a de Polignac number, because 51536965797 - 2²³ = 51528577189 is a prime.

It is a super-2 number, since 2×51536965797² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51536961797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188208 + ... + 372150.

Almost surely, 2^51536965797 is an apocalyptic number.

It is an amenable number.

51536965797 is a deficient number, since it is larger than the sum of its proper divisors (25729815067).

51536965797 is a wasteful number, since it uses less digits than its factorization.

51536965797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185111 (or 185099 counting only the distinct ones).

The product of its digits is 53581500, while the sum is 63.

The spelling of 51536965797 in words is "fifty-one billion, five hundred thirty-six million, nine hundred sixty-five thousand, seven hundred ninety-seven".