51775959777 has 4 divisors (see below), whose sum is σ = 69034613040. Its totient is φ = 34517306516.

The previous prime is 51775959769. The next prime is 51775959791. The reversal of 51775959777 is 77795957715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51775959777 - 2³ = 51775959769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51775959877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8629326627 + ... + 8629326632.

It is an arithmetic number, because the mean of its divisors is an integer number (17258653260).

Almost surely, 2^51775959777 is an apocalyptic number.

It is an amenable number.

51775959777 is a deficient number, since it is larger than the sum of its proper divisors (17258653263).

51775959777 is a wasteful number, since it uses less digits than its factorization.

51775959777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17258653262.

The product of its digits is 170170875, while the sum is 69.

The spelling of 51775959777 in words is "fifty-one billion, seven hundred seventy-five million, nine hundred fifty-nine thousand, seven hundred seventy-seven".