51581460252120 has 128 divisors (see below), whose sum is σ = 163741644288000. Its totient is φ = 12962879953920.

The previous prime is 51581460252109. The next prime is 51581460252163. The reversal of 51581460252120 is 2125206418515.

It is a congruent number.

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, 58788205 + ... + 59659164.

It is an arithmetic number, because the mean of its divisors is an integer number (1279231596000).

Almost surely, 2^{51581460252120} is an apocalyptic number.

It is an amenable number.

51581460252120 is an abundant number, since it is smaller than the sum of its proper divisors (112160184035880).

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

51581460252120 is a wasteful number, since it uses less digits than its factorization.

51581460252120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118447593 (or 118447589 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 42.

The spelling of 51581460252120 in words is "fifty-one trillion, five hundred eighty-one billion, four hundred sixty million, two hundred fifty-two thousand, one hundred twenty".