79616480257 has 2 divisors, whose sum is σ = 79616480258. Its totient is φ = 79616480256.

The previous prime is 79616480249. The next prime is 79616480269. The reversal of 79616480257 is 75208461697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78449847921 + 1166632336 = 280089^2 + 34156^2 .

It is a cyclic number.

It is not a de Polignac number, because 79616480257 - 2³ = 79616480249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79616480198 and 79616480207.

It is not a weakly prime, because it can be changed into another prime (79616480227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39808240128 + 39808240129.

It is an arithmetic number, because the mean of its divisors is an integer number (39808240129).

Almost surely, 2^79616480257 is an apocalyptic number.

It is an amenable number.

79616480257 is a deficient number, since it is larger than the sum of its proper divisors (1).

79616480257 is an equidigital number, since it uses as much as digits as its factorization.

79616480257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 79616480257 in words is "seventy-nine billion, six hundred sixteen million, four hundred eighty thousand, two hundred fifty-seven".