56121068520 has 192 divisors, whose sum is σ = 200127283200. Its totient is φ = 13526300160.

The previous prime is 56121068513. The next prime is 56121068533. The reversal of 56121068520 is 2586012165.

56121068520 is a `hidden beast` number, since 5 + 6 + 121 + 0 + 6 + 8 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 644121 + ... + 726039.

It is an arithmetic number, because the mean of its divisors is an integer number (1042329600).

Almost surely, 2^56121068520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56121068520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100063641600).

56121068520 is an abundant number, since it is smaller than the sum of its proper divisors (144006214680).

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

56121068520 is a wasteful number, since it uses less digits than its factorization.

56121068520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82120 (or 82113 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 56121068520 in words is "fifty-six billion, one hundred twenty-one million, sixty-eight thousand, five hundred twenty".