6366403671631 has 4 divisors (see below), whose sum is σ = 6405461363032. Its totient is φ = 6327345980232.

The previous prime is 6366403671521. The next prime is 6366403671647. The reversal of 6366403671631 is 1361763046636.

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

It is a cyclic number.

It is not a de Polignac number, because 6366403671631 - 2¹³ = 6366403663439 is a prime.

It is a super-2 number, since 2×6366403671631² (a number of 26 digits) 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 (6366403621631) 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, 19528845456 + ... + 19528845781.

It is an arithmetic number, because the mean of its divisors is an integer number (1601365340758).

Almost surely, 2^{6366403671631} is an apocalyptic number.

6366403671631 is a deficient number, since it is larger than the sum of its proper divisors (39057691401).

6366403671631 is a wasteful number, since it uses less digits than its factorization.

6366403671631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39057691400.

The product of its (nonzero) digits is 5878656, while the sum is 52.

The spelling of 6366403671631 in words is "six trillion, three hundred sixty-six billion, four hundred three million, six hundred seventy-one thousand, six hundred thirty-one".