51790905756 has 72 divisors (see below), whose sum is σ = 138861384480. Its totient is φ = 16219462656.

The previous prime is 51790905709. The next prime is 51790905769. The reversal of 51790905756 is 65750909715.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273865 + ... + 422591.

It is an arithmetic number, because the mean of its divisors is an integer number (1928630340).

Almost surely, 2^51790905756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51790905756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69430692240).

51790905756 is an abundant number, since it is smaller than the sum of its proper divisors (87070478724).

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

51790905756 is a wasteful number, since it uses less digits than its factorization.

51790905756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149323 (or 149318 counting only the distinct ones).

The product of its (nonzero) digits is 2976750, while the sum is 54.

The spelling of 51790905756 in words is "fifty-one billion, seven hundred ninety million, nine hundred five thousand, seven hundred fifty-six".