39516949961 has 2 divisors, whose sum is σ = 39516949962. Its totient is φ = 39516949960.

The previous prime is 39516949931. The next prime is 39516949999. The reversal of 39516949961 is 16994961593.

39516949961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23403186361 + 16113763600 = 152981^2 + 126940^2 .

It is a cyclic number.

It is not a de Polignac number, because 39516949961 - 2¹⁰ = 39516948937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39516949894 and 39516949903.

It is not a weakly prime, because it can be changed into another prime (39516949931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19758474980 + 19758474981.

It is an arithmetic number, because the mean of its divisors is an integer number (19758474981).

Almost surely, 2^39516949961 is an apocalyptic number.

It is an amenable number.

39516949961 is a deficient number, since it is larger than the sum of its proper divisors (1).

39516949961 is an equidigital number, since it uses as much as digits as its factorization.

39516949961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14171760, while the sum is 62.

The spelling of 39516949961 in words is "thirty-nine billion, five hundred sixteen million, nine hundred forty-nine thousand, nine hundred sixty-one".