51913318408 has 32 divisors (see below), whose sum is σ = 111925316160. Its totient is φ = 22112066880.

The previous prime is 51913318397. The next prime is 51913318409. The reversal of 51913318408 is 80481331915.

It is not an unprimeable number, because it can be changed into a prime (51913318409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2834503 + ... + 2852758.

It is an arithmetic number, because the mean of its divisors is an integer number (3497666130).

Almost surely, 2^51913318408 is an apocalyptic number.

It is an amenable number.

51913318408 is an abundant number, since it is smaller than the sum of its proper divisors (60011997752).

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

51913318408 is a wasteful number, since it uses less digits than its factorization.

51913318408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687437 (or 5687433 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 51913318408 in words is "fifty-one billion, nine hundred thirteen million, three hundred eighteen thousand, four hundred eight".