5657657621 has 24 divisors (see below), whose sum is σ = 7241294592. Its totient is φ = 4325349600.

The previous prime is 5657657611. The next prime is 5657657633. The reversal of 5657657621 is 1267567565.

It is not a de Polignac number, because 5657657621 - 2⁶ = 5657657557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5657657621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5657657611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18125 + ... + 107906.

It is an arithmetic number, because the mean of its divisors is an integer number (301720608).

Almost surely, 2^5657657621 is an apocalyptic number.

It is an amenable number.

5657657621 is a deficient number, since it is larger than the sum of its proper divisors (1583636971).

5657657621 is a wasteful number, since it uses less digits than its factorization.

5657657621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126113 (or 126102 counting only the distinct ones).

The product of its digits is 2646000, while the sum is 50.

The square root of 5657657621 is about 75217.4023813638. The cubic root of 5657657621 is about 1781.8817810108.

The spelling of 5657657621 in words is "five billion, six hundred fifty-seven million, six hundred fifty-seven thousand, six hundred twenty-one".