5621591956 has 24 divisors (see below), whose sum is σ = 10163301120. Its totient is φ = 2717937600.

The previous prime is 5621591951. The next prime is 5621591981. The reversal of 5621591956 is 6591951265.

It is a super-2 number, since 2×5621591956² = 63204592239527811872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5621591951) 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 7 ways as a sum of consecutive naturals, for example, 142251 + ... + 177421.

It is an arithmetic number, because the mean of its divisors is an integer number (423470880).

Almost surely, 2^5621591956 is an apocalyptic number.

It is an amenable number.

5621591956 is a deficient number, since it is larger than the sum of its proper divisors (4541709164).

5621591956 is a wasteful number, since it uses less digits than its factorization.

5621591956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36495 (or 36493 counting only the distinct ones).

The product of its digits is 729000, while the sum is 49.

The square root of 5621591956 is about 74977.2762642122. The cubic root of 5621591956 is about 1778.0874078641.

The spelling of 5621591956 in words is "five billion, six hundred twenty-one million, five hundred ninety-one thousand, nine hundred fifty-six".