79964445511 has 2 divisors, whose sum is σ = 79964445512. Its totient is φ = 79964445510.

The previous prime is 79964445493. The next prime is 79964445523. The reversal of 79964445511 is 11554446997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79964445511 - 2²³ = 79956056903 is a prime.

It is a super-2 number, since 2×79964445511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79964445581) 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, 39982222755 + 39982222756.

It is an arithmetic number, because the mean of its divisors is an integer number (39982222756).

Almost surely, 2^79964445511 is an apocalyptic number.

79964445511 is a deficient number, since it is larger than the sum of its proper divisors (1).

79964445511 is an equidigital number, since it uses as much as digits as its factorization.

79964445511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 55.

The spelling of 79964445511 in words is "seventy-nine billion, nine hundred sixty-four million, four hundred forty-five thousand, five hundred eleven".