3956398452049 has 2 divisors, whose sum is σ = 3956398452050. Its totient is φ = 3956398452048.

The previous prime is 3956398451947. The next prime is 3956398452067. The reversal of 3956398452049 is 9402548936593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3305149452049 + 651249000000 = 1818007^2 + 807000^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956398452049 - 2²⁹ = 3955861581137 is a prime.

It is a super-2 number, since 2×3956398452049² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3956398459049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978199226024 + 1978199226025.

It is an arithmetic number, because the mean of its divisors is an integer number (1978199226025).

Almost surely, 2^{3956398452049} is an apocalyptic number.

It is an amenable number.

3956398452049 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956398452049 is an equidigital number, since it uses as much as digits as its factorization.

3956398452049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 251942400, while the sum is 67.

The spelling of 3956398452049 in words is "three trillion, nine hundred fifty-six billion, three hundred ninety-eight million, four hundred fifty-two thousand, forty-nine".