51801687766 has 16 divisors (see below), whose sum is σ = 80747395200. Its totient is φ = 24897104640.

The previous prime is 51801687757. The next prime is 51801687787. The reversal of 51801687766 is 66778610815.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2794491 + ... + 2812966.

It is an arithmetic number, because the mean of its divisors is an integer number (5046712200).

Almost surely, 2^51801687766 is an apocalyptic number.

51801687766 is a deficient number, since it is larger than the sum of its proper divisors (28945707434).

51801687766 is a wasteful number, since it uses less digits than its factorization.

51801687766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5607639.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 51801687766 in words is "fifty-one billion, eight hundred one million, six hundred eighty-seven thousand, seven hundred sixty-six".