51511248708 has 24 divisors (see below), whose sum is σ = 122230083360. Its totient is φ = 16879392000.

The previous prime is 51511248703. The next prime is 51511248773. The reversal of 51511248708 is 80784211515.

It is a self number, because there is not a number n which added to its sum of digits gives 51511248708.

It is not an unprimeable number, because it can be changed into a prime (51511248703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36377293 + ... + 36378708.

It is an arithmetic number, because the mean of its divisors is an integer number (5092920140).

Almost surely, 2^51511248708 is an apocalyptic number.

It is an amenable number.

51511248708 is an abundant number, since it is smaller than the sum of its proper divisors (70718834652).

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

51511248708 is a wasteful number, since it uses less digits than its factorization.

51511248708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72756067 (or 72756065 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 42.

The spelling of 51511248708 in words is "fifty-one billion, five hundred eleven million, two hundred forty-eight thousand, seven hundred eight".