51510552122556 has 36 divisors (see below), whose sum is σ = 131401790720200. Its totient is φ = 17012659415328.

The previous prime is 51510552122551. The next prime is 51510552122563. The reversal of 51510552122556 is 65522125501515.

51510552122556 is a `hidden beast` number, since 5 + 1 + 5 + 1 + 0 + 55 + 21 + 22 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51510552122551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6563522086 + ... + 6563529933.

Almost surely, 2^{51510552122556} is an apocalyptic number.

It is an amenable number.

51510552122556 is an abundant number, since it is smaller than the sum of its proper divisors (79891238597644).

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

51510552122556 is a wasteful number, since it uses less digits than its factorization.

51510552122556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13127052138 (or 13127052133 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 45.

The spelling of 51510552122556 in words is "fifty-one trillion, five hundred ten billion, five hundred fifty-two million, one hundred twenty-two thousand, five hundred fifty-six".