51905319580 has 24 divisors (see below), whose sum is σ = 109008955440. Its totient is φ = 20760645120.

The previous prime is 51905319527. The next prime is 51905319589. The reversal of 51905319580 is 8591350915.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51905319580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51905319589) 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, 220140 + ... + 390220.

It is an arithmetic number, because the mean of its divisors is an integer number (4542039810).

Almost surely, 2^51905319580 is an apocalyptic number.

It is an amenable number.

51905319580 is an abundant number, since it is smaller than the sum of its proper divisors (57103635860).

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

51905319580 is a wasteful number, since it uses less digits than its factorization.

51905319580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185349 (or 185347 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 51905319580 in words is "fifty-one billion, nine hundred five million, three hundred nineteen thousand, five hundred eighty".