79554649717 has 2 divisors, whose sum is σ = 79554649718. Its totient is φ = 79554649716.

The previous prime is 79554649711. The next prime is 79554649819. The reversal of 79554649717 is 71794645597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64875146436 + 14679503281 = 254706^2 + 121159^2 .

It is a cyclic number.

It is not a de Polignac number, because 79554649717 - 2¹⁵ = 79554616949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79554649711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39777324858 + 39777324859.

It is an arithmetic number, because the mean of its divisors is an integer number (39777324859).

Almost surely, 2^79554649717 is an apocalyptic number.

It is an amenable number.

79554649717 is a deficient number, since it is larger than the sum of its proper divisors (1).

79554649717 is an equidigital number, since it uses as much as digits as its factorization.

79554649717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66679200, while the sum is 64.

The spelling of 79554649717 in words is "seventy-nine billion, five hundred fifty-four million, six hundred forty-nine thousand, seven hundred seventeen".