5645649931 has 2 divisors, whose sum is σ = 5645649932. Its totient is φ = 5645649930.

The previous prime is 5645649899. The next prime is 5645649937. The reversal of 5645649931 is 1399465465.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5645649931 - 2⁵ = 5645649899 is a prime.

It is a super-2 number, since 2×5645649931² = 63746726286800609522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5645649937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822824965 + 2822824966.

It is an arithmetic number, because the mean of its divisors is an integer number (2822824966).

Almost surely, 2^5645649931 is an apocalyptic number.

5645649931 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645649931 is an equidigital number, since it uses as much as digits as its factorization.

5645649931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 52.

The square root of 5645649931 is about 75137.5400914882. The cubic root of 5645649931 is about 1780.6202790280.

The spelling of 5645649931 in words is "five billion, six hundred forty-five million, six hundred forty-nine thousand, nine hundred thirty-one".