39516949931 has 2 divisors, whose sum is σ = 39516949932. Its totient is φ = 39516949930.

The previous prime is 39516949919. The next prime is 39516949961. The reversal of 39516949931 is 13994961593.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39516949931 - 2¹⁰ = 39516948907 is a prime.

It is a super-2 number, since 2×39516949931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39516949961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19758474965 + 19758474966.

It is an arithmetic number, because the mean of its divisors is an integer number (19758474966).

Almost surely, 2^39516949931 is an apocalyptic number.

39516949931 is a deficient number, since it is larger than the sum of its proper divisors (1).

39516949931 is an equidigital number, since it uses as much as digits as its factorization.

39516949931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7085880, while the sum is 59.

The spelling of 39516949931 in words is "thirty-nine billion, five hundred sixteen million, nine hundred forty-nine thousand, nine hundred thirty-one".