3646731631 has 2 divisors, whose sum is σ = 3646731632. Its totient is φ = 3646731630.

The previous prime is 3646731589. The next prime is 3646731661. The reversal of 3646731631 is 1361376463.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3646731631 - 2²⁷ = 3512513903 is a prime.

It is a super-2 number, since 2×3646731631² = 26597303177071840322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3646731661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1823365815 + 1823365816.

It is an arithmetic number, because the mean of its divisors is an integer number (1823365816).

Almost surely, 2^3646731631 is an apocalyptic number.

3646731631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3646731631 is an equidigital number, since it uses as much as digits as its factorization.

3646731631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 40.

The square root of 3646731631 is about 60388.1745956938. The cubic root of 3646731631 is about 1539.2220210280. Note that the first 3 decimals are identical.

The spelling of 3646731631 in words is "three billion, six hundred forty-six million, seven hundred thirty-one thousand, six hundred thirty-one".