5656342621 has 4 divisors (see below), whose sum is σ = 5683150144. Its totient is φ = 5629535100.

The previous prime is 5656342609. The next prime is 5656342631. The reversal of 5656342621 is 1262436565.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5656342621 - 2⁵ = 5656342589 is a prime.

It is a super-2 number, since 2×5656342621² = 63988423692282299282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5656342631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13403445 + ... + 13403866.

It is an arithmetic number, because the mean of its divisors is an integer number (1420787536).

Almost surely, 2^5656342621 is an apocalyptic number.

It is an amenable number.

5656342621 is a deficient number, since it is larger than the sum of its proper divisors (26807523).

5656342621 is a wasteful number, since it uses less digits than its factorization.

5656342621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26807522.

The product of its digits is 259200, while the sum is 40.

The square root of 5656342621 is about 75208.6605451792. The cubic root of 5656342621 is about 1781.7437170355.

The spelling of 5656342621 in words is "five billion, six hundred fifty-six million, three hundred forty-two thousand, six hundred twenty-one".