56533213660 has 96 divisors (see below), whose sum is σ = 148211804160. Its totient is φ = 17597222400.

The previous prime is 56533213631. The next prime is 56533213661. The reversal of 56533213660 is 6631233565.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56533213661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1147821 + ... + 1196059.

It is an arithmetic number, because the mean of its divisors is an integer number (1543872960).

Almost surely, 2^56533213660 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 56533213660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74105902080).

56533213660 is an abundant number, since it is smaller than the sum of its proper divisors (91678590500).

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

56533213660 is a wasteful number, since it uses less digits than its factorization.

56533213660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49027 (or 49025 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 40.

The spelling of 56533213660 in words is "fifty-six billion, five hundred thirty-three million, two hundred thirteen thousand, six hundred sixty".