51767724377 has 4 divisors (see below), whose sum is σ = 51769529616. Its totient is φ = 51765919140.

The previous prime is 51767724361. The next prime is 51767724389. The reversal of 51767724377 is 77342776715.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77342776715 = 5 ⋅15468555343.

It is a cyclic number.

It is not a de Polignac number, because 51767724377 - 2⁴ = 51767724361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51767724317) 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, 858899 + ... + 917192.

It is an arithmetic number, because the mean of its divisors is an integer number (12942382404).

Almost surely, 2^51767724377 is an apocalyptic number.

It is an amenable number.

51767724377 is a deficient number, since it is larger than the sum of its proper divisors (1805239).

51767724377 is a wasteful number, since it uses less digits than its factorization.

51767724377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805238.

The product of its digits is 12101040, while the sum is 56.

The spelling of 51767724377 in words is "fifty-one billion, seven hundred sixty-seven million, seven hundred twenty-four thousand, three hundred seventy-seven".