51511860136 has 16 divisors (see below), whose sum is σ = 105365168640. Its totient is φ = 23414481840.

The previous prime is 51511860121. The next prime is 51511860149. The reversal of 51511860136 is 63106811515.

It is a junction number, because it is equal to n+sod(n) for n = 51511860095 and 51511860104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292680936 + ... + 292681111.

It is an arithmetic number, because the mean of its divisors is an integer number (6585323040).

Almost surely, 2^51511860136 is an apocalyptic number.

It is an amenable number.

51511860136 is an abundant number, since it is smaller than the sum of its proper divisors (53853308504).

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

51511860136 is a wasteful number, since it uses less digits than its factorization.

51511860136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585362064 (or 585362060 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 51511860136 in words is "fifty-one billion, five hundred eleven million, eight hundred sixty thousand, one hundred thirty-six".