5656371880 has 32 divisors (see below), whose sum is σ = 12843606600. Its totient is φ = 2241789696.

The previous prime is 5656371871. The next prime is 5656371881. The reversal of 5656371880 is 881736565.

It can be written as a sum of positive squares in 4 ways, for example, as 5467419364 + 188952516 = 73942^2 + 13746^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (5656371881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644307 + ... + 653026.

Almost surely, 2^5656371880 is an apocalyptic number.

It is an amenable number.

5656371880 is an abundant number, since it is smaller than the sum of its proper divisors (7187234720).

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

5656371880 is a wasteful number, since it uses less digits than its factorization.

5656371880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297453 (or 1297449 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 5656371880 is about 75208.8550637490. The cubic root of 5656371880 is about 1781.7467892180.

The spelling of 5656371880 in words is "five billion, six hundred fifty-six million, three hundred seventy-one thousand, eight hundred eighty".