79556677229 has 2 divisors, whose sum is σ = 79556677230. Its totient is φ = 79556677228.

The previous prime is 79556677199. The next prime is 79556677243. The reversal of 79556677229 is 92277665597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75850668100 + 3706009129 = 275410^2 + 60877^2 .

It is a cyclic number.

It is not a de Polignac number, because 79556677229 - 2⁸ = 79556676973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79556677289) 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, 39778338614 + 39778338615.

It is an arithmetic number, because the mean of its divisors is an integer number (39778338615).

Almost surely, 2^79556677229 is an apocalyptic number.

It is an amenable number.

79556677229 is a deficient number, since it is larger than the sum of its proper divisors (1).

79556677229 is an equidigital number, since it uses as much as digits as its factorization.

79556677229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100018800, while the sum is 65.

The spelling of 79556677229 in words is "seventy-nine billion, five hundred fifty-six million, six hundred seventy-seven thousand, two hundred twenty-nine".