56191475520 has 672 divisors, whose sum is σ = 214283422080. Its totient is φ = 13974405120.

The previous prime is 56191475519. The next prime is 56191475609. The reversal of 56191475520 is 2557419165.

It is a happy number.

56191475520 is a `hidden beast` number, since 5 + 6 + 1 + 91 + 4 + 7 + 552 + 0 = 666.

It is a super-2 number, since 2×56191475520² (a number of 22 digits) contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 107852860 + ... + 107853380.

It is an arithmetic number, because the mean of its divisors is an integer number (318874140).

Almost surely, 2^56191475520 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 56191475520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107141711040).

56191475520 is an abundant number, since it is smaller than the sum of its proper divisors (158091946560).

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

56191475520 is a wasteful number, since it uses less digits than its factorization.

56191475520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 56191475520 in words is "fifty-six billion, one hundred ninety-one million, four hundred seventy-five thousand, five hundred twenty".