56671457220 has 480 divisors, whose sum is σ = 211199788800. Its totient is φ = 12446493696.

The previous prime is 56671457197. The next prime is 56671457279. The reversal of 56671457220 is 2275417665.

56671457220 is a `hidden beast` number, since 5 + 6 + 6 + 71 + 4 + 572 + 2 + 0 = 666.

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

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 159 ways as a sum of consecutive naturals, for example, 127926319 + ... + 127926761.

It is an arithmetic number, because the mean of its divisors is an integer number (439999560).

Almost surely, 2^56671457220 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 56671457220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105599894400).

56671457220 is an abundant number, since it is smaller than the sum of its proper divisors (154528331580).

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

56671457220 is a wasteful number, since it uses less digits than its factorization.

56671457220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 56671457220 in words is "fifty-six billion, six hundred seventy-one million, four hundred fifty-seven thousand, two hundred twenty".