39649452961 has 2 divisors, whose sum is σ = 39649452962. Its totient is φ = 39649452960.

The previous prime is 39649452949. The next prime is 39649452967. The reversal of 39649452961 is 16925494693.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34393927936 + 5255525025 = 185456^2 + 72495^2 .

It is a cyclic number.

It is not a de Polignac number, because 39649452961 - 2⁹ = 39649452449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39649452896 and 39649452905.

It is not a weakly prime, because it can be changed into another prime (39649452967) 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, 19824726480 + 19824726481.

It is an arithmetic number, because the mean of its divisors is an integer number (19824726481).

Almost surely, 2^39649452961 is an apocalyptic number.

It is an amenable number.

39649452961 is a deficient number, since it is larger than the sum of its proper divisors (1).

39649452961 is an equidigital number, since it uses as much as digits as its factorization.

39649452961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12597120, while the sum is 58.

The spelling of 39649452961 in words is "thirty-nine billion, six hundred forty-nine million, four hundred fifty-two thousand, nine hundred sixty-one".