5640817631 has 2 divisors, whose sum is σ = 5640817632. Its totient is φ = 5640817630.

The previous prime is 5640817571. The next prime is 5640817639. The reversal of 5640817631 is 1367180465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5640817631 - 2¹⁴ = 5640801247 is a prime.

It is a super-2 number, since 2×5640817631² = 63637647092400904322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5640817639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820408815 + 2820408816.

It is an arithmetic number, because the mean of its divisors is an integer number (2820408816).

Almost surely, 2^5640817631 is an apocalyptic number.

5640817631 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640817631 is an equidigital number, since it uses as much as digits as its factorization.

5640817631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 5640817631 is about 75105.3768448039. The cubic root of 5640817631 is about 1780.1121032582.

The spelling of 5640817631 in words is "five billion, six hundred forty million, eight hundred seventeen thousand, six hundred thirty-one".