51522639278280 has 128 divisors (see below), whose sum is σ = 161573651251200. Its totient is φ = 13127859014400.

The previous prime is 51522639278171. The next prime is 51522639278293. The reversal of 51522639278280 is 8287293622515.

It is a super-2 number, since 2×51522639278280² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87365436 + ... + 87953195.

It is an arithmetic number, because the mean of its divisors is an integer number (1262294150400).

Almost surely, 2^{51522639278280} is an apocalyptic number.

It is an amenable number.

51522639278280 is an abundant number, since it is smaller than the sum of its proper divisors (110051011972920).

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

51522639278280 is a wasteful number, since it uses less digits than its factorization.

51522639278280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175318755 (or 175318751 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 51522639278280 in words is "fifty-one trillion, five hundred twenty-two billion, six hundred thirty-nine million, two hundred seventy-eight thousand, two hundred eighty".