51136706774 has 4 divisors (see below), whose sum is σ = 76705060164. Its totient is φ = 25568353386.

The previous prime is 51136706767. The next prime is 51136706827. The reversal of 51136706774 is 47760763115.

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

It is a super-2 number, since 2×51136706774² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12784176692 + ... + 12784176695.

It is an arithmetic number, because the mean of its divisors is an integer number (19176265041).

Almost surely, 2^51136706774 is an apocalyptic number.

51136706774 is a deficient number, since it is larger than the sum of its proper divisors (25568353390).

51136706774 is a wasteful number, since it uses less digits than its factorization.

51136706774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25568353389.

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 51136706774 in words is "fifty-one billion, one hundred thirty-six million, seven hundred six thousand, seven hundred seventy-four".