56513720051880 has 4096 divisors, whose sum is σ = 251695890432000. Its totient is φ = 9803582668800.

The previous prime is 56513720051839. The next prime is 56513720051927. The reversal of 56513720051880 is 8815002731565.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 1023 ways as a sum of consecutive naturals, for example, 246784803606 + ... + 246784803834.

It is an arithmetic number, because the mean of its divisors is an integer number (61449192000).

Almost surely, 2^{56513720051880} 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 56513720051880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125847945216000).

56513720051880 is an abundant number, since it is smaller than the sum of its proper divisors (195182170380120).

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

56513720051880 is a wasteful number, since it uses less digits than its factorization.

56513720051880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 51.

The spelling of 56513720051880 in words is "fifty-six trillion, five hundred thirteen billion, seven hundred twenty million, fifty-one thousand, eight hundred eighty".