51772564967 has 4 divisors (see below), whose sum is σ = 53035310496. Its totient is φ = 50509819440.

The previous prime is 51772564901. The next prime is 51772564993. The reversal of 51772564967 is 76946527715.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51772564967 - 2¹² = 51772560871 is a prime.

It is a super-2 number, since 2×51772564967² (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 (51772567967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631372703 + ... + 631372784.

It is an arithmetic number, because the mean of its divisors is an integer number (13258827624).

Almost surely, 2^51772564967 is an apocalyptic number.

51772564967 is a deficient number, since it is larger than the sum of its proper divisors (1262745529).

51772564967 is a wasteful number, since it uses less digits than its factorization.

51772564967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262745528.

The product of its digits is 22226400, while the sum is 59.

The spelling of 51772564967 in words is "fifty-one billion, seven hundred seventy-two million, five hundred sixty-four thousand, nine hundred sixty-seven".