40649236931 has 2 divisors, whose sum is σ = 40649236932. Its totient is φ = 40649236930.

The previous prime is 40649236889. The next prime is 40649237017. The reversal of 40649236931 is 13963294604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40649236931 - 2³⁰ = 39575495107 is a prime.

It is a super-2 number, since 2×40649236931² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40649236631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20324618465 + 20324618466.

It is an arithmetic number, because the mean of its divisors is an integer number (20324618466).

Almost surely, 2^40649236931 is an apocalyptic number.

40649236931 is a deficient number, since it is larger than the sum of its proper divisors (1).

40649236931 is an equidigital number, since it uses as much as digits as its factorization.

40649236931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 47.

The spelling of 40649236931 in words is "forty billion, six hundred forty-nine million, two hundred thirty-six thousand, nine hundred thirty-one".