79846869449 has 2 divisors, whose sum is σ = 79846869450. Its totient is φ = 79846869448.

The previous prime is 79846869383. The next prime is 79846869457. The reversal of 79846869449 is 94496864897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77135063824 + 2711805625 = 277732^2 + 52075^2 .

It is an emirp because it is prime and its reverse (94496864897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79846869449 - 2²⁴ = 79830092233 is a prime.

It is not a weakly prime, because it can be changed into another prime (79846869469) 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, 39923434724 + 39923434725.

It is an arithmetic number, because the mean of its divisors is an integer number (39923434725).

Almost surely, 2^79846869449 is an apocalyptic number.

It is an amenable number.

79846869449 is a deficient number, since it is larger than the sum of its proper divisors (1).

79846869449 is an equidigital number, since it uses as much as digits as its factorization.

79846869449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752467968, while the sum is 74.

The spelling of 79846869449 in words is "seventy-nine billion, eight hundred forty-six million, eight hundred sixty-nine thousand, four hundred forty-nine".