56646621280 has 96 divisors (see below), whose sum is σ = 141103468800. Its totient is φ = 21430697472.

The previous prime is 56646621277. The next prime is 56646621289. The reversal of 56646621280 is 8212664665.

It is a self number, because there is not a number n which added to its sum of digits gives 56646621280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56646621289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1866709 + ... + 1896811.

It is an arithmetic number, because the mean of its divisors is an integer number (1469827800).

Almost surely, 2^56646621280 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 56646621280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70551734400).

56646621280 is an abundant number, since it is smaller than the sum of its proper divisors (84456847520).

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

56646621280 is a wasteful number, since it uses less digits than its factorization.

56646621280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30756 (or 30748 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 56646621280 in words is "fifty-six billion, six hundred forty-six million, six hundred twenty-one thousand, two hundred eighty".