5664631454621 has 4 divisors (see below), whose sum is σ = 5664638320572. Its totient is φ = 5664624588672.

The previous prime is 5664631454597. The next prime is 5664631454627. The reversal of 5664631454621 is 1264541364665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4849112284900 + 815519169721 = 2202070^2 + 903061^2 .

It is a cyclic number.

It is not a de Polignac number, because 5664631454621 - 2⁴² = 1266584943517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5664631454627) 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, 1994516 + ... + 3912461.

It is an arithmetic number, because the mean of its divisors is an integer number (1416159580143).

Almost surely, 2^{5664631454621} is an apocalyptic number.

It is an amenable number.

5664631454621 is a deficient number, since it is larger than the sum of its proper divisors (6865951).

5664631454621 is an equidigital number, since it uses as much as digits as its factorization.

5664631454621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6865950.

The product of its digits is 12441600, while the sum is 53.

The spelling of 5664631454621 in words is "five trillion, six hundred sixty-four billion, six hundred thirty-one million, four hundred fifty-four thousand, six hundred twenty-one".