3991577078659 has 2 divisors, whose sum is σ = 3991577078660. Its totient is φ = 3991577078658.

The previous prime is 3991577078537. The next prime is 3991577078683. The reversal of 3991577078659 is 9568707751993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3991577078659 is a prime.

It is not a weakly prime, because it can be changed into another prime (3991577075659) 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, 1995788539329 + 1995788539330.

It is an arithmetic number, because the mean of its divisors is an integer number (1995788539330).

Almost surely, 2^{3991577078659} is an apocalyptic number.

3991577078659 is a deficient number, since it is larger than the sum of its proper divisors (1).

3991577078659 is an equidigital number, since it uses as much as digits as its factorization.

3991577078659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900169200, while the sum is 76.

The spelling of 3991577078659 in words is "three trillion, nine hundred ninety-one billion, five hundred seventy-seven million, seventy-eight thousand, six hundred fifty-nine".