79964445553 has 2 divisors, whose sum is σ = 79964445554. Its totient is φ = 79964445552.

The previous prime is 79964445523. The next prime is 79964445581. The reversal of 79964445553 is 35554446997.

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., 78135343729 + 1829101824 = 279527^2 + 42768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79964445553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79964445491 and 79964445500.

It is not a weakly prime, because it can be changed into another prime (79964445523) 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, 39982222776 + 39982222777.

It is an arithmetic number, because the mean of its divisors is an integer number (39982222777).

Almost surely, 2^79964445553 is an apocalyptic number.

It is an amenable number.

79964445553 is a deficient number, since it is larger than the sum of its proper divisors (1).

79964445553 is an equidigital number, since it uses as much as digits as its factorization.

79964445553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648000, while the sum is 61.

The spelling of 79964445553 in words is "seventy-nine billion, nine hundred sixty-four million, four hundred forty-five thousand, five hundred fifty-three".