56128751280 has 480 divisors, whose sum is σ = 232165140480. Its totient is φ = 12414850560.

The previous prime is 56128751213. The next prime is 56128751291. The reversal of 56128751280 is 8215782165.

56128751280 is a `hidden beast` number, since 5 + 6 + 128 + 7 + 512 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3272487 + ... + 3289593.

It is an arithmetic number, because the mean of its divisors is an integer number (483677376).

Almost surely, 2^56128751280 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 56128751280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116082570240).

56128751280 is an abundant number, since it is smaller than the sum of its proper divisors (176036389200).

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

56128751280 is a wasteful number, since it uses less digits than its factorization.

56128751280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17174 (or 17155 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 56128751280 in words is "fifty-six billion, one hundred twenty-eight million, seven hundred fifty-one thousand, two hundred eighty".