79551964757 has 2 divisors, whose sum is σ = 79551964758. Its totient is φ = 79551964756.

The previous prime is 79551964753. The next prime is 79551964769. The reversal of 79551964757 is 75746915597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41170844836 + 38381119921 = 202906^2 + 195911^2 .

It is a cyclic number.

It is not a de Polignac number, because 79551964757 - 2² = 79551964753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79551964693 and 79551964702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79551964753) 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, 39775982378 + 39775982379.

It is an arithmetic number, because the mean of its divisors is an integer number (39775982379).

Almost surely, 2^79551964757 is an apocalyptic number.

It is an amenable number.

79551964757 is a deficient number, since it is larger than the sum of its proper divisors (1).

79551964757 is an equidigital number, since it uses as much as digits as its factorization.

79551964757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83349000, while the sum is 65.

The spelling of 79551964757 in words is "seventy-nine billion, five hundred fifty-one million, nine hundred sixty-four thousand, seven hundred fifty-seven".