51316550136 has 80 divisors (see below), whose sum is σ = 145553416800. Its totient is φ = 16888974336.

The previous prime is 51316550113. The next prime is 51316550137. The reversal of 51316550136 is 63105561315.

51316550136 is a `hidden beast` number, since 513 + 1 + 6 + 5 + 5 + 0 + 136 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51316550136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51316550137) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 450025 + ... + 552408.

It is an arithmetic number, because the mean of its divisors is an integer number (1819417710).

Almost surely, 2^51316550136 is an apocalyptic number.

It is an amenable number.

51316550136 is an abundant number, since it is smaller than the sum of its proper divisors (94236866664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51316550136 is a wasteful number, since it uses less digits than its factorization.

51316550136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002530 (or 1002517 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 51316550136 in words is "fifty-one billion, three hundred sixteen million, five hundred fifty thousand, one hundred thirty-six".