56621049380 has 72 divisors (see below), whose sum is σ = 138688853688. Its totient is φ = 19360760832.

The previous prime is 56621049293. The next prime is 56621049383. The reversal of 56621049380 is 8394012665.

It can be written as a sum of positive squares in 4 ways, for example, as 1354681636 + 55266367744 = 36806^2 + 235088^2 .

It is not an unprimeable number, because it can be changed into a prime (56621049383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288092 + ... + 442988.

It is an arithmetic number, because the mean of its divisors is an integer number (1926234079).

Almost surely, 2^56621049380 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 56621049380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69344426844).

56621049380 is an abundant number, since it is smaller than the sum of its proper divisors (82067804308).

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

56621049380 is a wasteful number, since it uses less digits than its factorization.

56621049380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155293 (or 155284 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 56621049380 in words is "fifty-six billion, six hundred twenty-one million, forty-nine thousand, three hundred eighty".