5656316991 has 32 divisors (see below), whose sum is σ = 8376177600. Its totient is φ = 3372979200.

The previous prime is 5656316987. The next prime is 5656317013. The reversal of 5656316991 is 1996136565.

It is a happy number.

5656316991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5656316991 - 2² = 5656316987 is a prime.

It is a super-4 number, since 4×5656316991⁴ (a number of 40 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5656317991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226381 + ... + 250121.

It is an arithmetic number, because the mean of its divisors is an integer number (261755550).

Almost surely, 2^5656316991 is an apocalyptic number.

5656316991 is a deficient number, since it is larger than the sum of its proper divisors (2719860609).

5656316991 is a wasteful number, since it uses less digits than its factorization.

5656316991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23947.

The product of its digits is 1312200, while the sum is 51.

The square root of 5656316991 is about 75208.4901523757. The cubic root of 5656316991 is about 1781.7410258878.

The spelling of 5656316991 in words is "five billion, six hundred fifty-six million, three hundred sixteen thousand, nine hundred ninety-one".