51085869280 has 48 divisors (see below), whose sum is σ = 120758060304. Its totient is φ = 20422886400.

The previous prime is 51085869229. The next prime is 51085869323. The reversal of 51085869280 is 8296858015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199519 + ... + 376801.

It is an arithmetic number, because the mean of its divisors is an integer number (2515792923).

Almost surely, 2^51085869280 is an apocalyptic number.

It is an amenable number.

51085869280 is an abundant number, since it is smaller than the sum of its proper divisors (69672191024).

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

51085869280 is a wasteful number, since it uses less digits than its factorization.

51085869280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179099 (or 179091 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 51085869280 in words is "fifty-one billion, eighty-five million, eight hundred sixty-nine thousand, two hundred eighty".