51774677566 has 16 divisors (see below), whose sum is σ = 79289175168. Its totient is φ = 25348759200.

The previous prime is 51774677557. The next prime is 51774677579. The reversal of 51774677566 is 66577647715.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924325 + ... + 978736.

It is an arithmetic number, because the mean of its divisors is an integer number (4955573448).

Almost surely, 2^51774677566 is an apocalyptic number.

51774677566 is a deficient number, since it is larger than the sum of its proper divisors (27514497602).

51774677566 is a wasteful number, since it uses less digits than its factorization.

51774677566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903347.

The product of its digits is 51861600, while the sum is 61.

The spelling of 51774677566 in words is "fifty-one billion, seven hundred seventy-four million, six hundred seventy-seven thousand, five hundred sixty-six".