79391795501 has 2 divisors, whose sum is σ = 79391795502. Its totient is φ = 79391795500.

The previous prime is 79391795473. The next prime is 79391795503. The reversal of 79391795501 is 10559719397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70516271401 + 8875524100 = 265549^2 + 94210^2 .

It is a cyclic number.

It is not a de Polignac number, because 79391795501 - 2¹⁰ = 79391794477 is a prime.

It is a Sophie Germain prime.

Together with 79391795503, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79391795503) 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, 39695897750 + 39695897751.

It is an arithmetic number, because the mean of its divisors is an integer number (39695897751).

Almost surely, 2^79391795501 is an apocalyptic number.

It is an amenable number.

79391795501 is a deficient number, since it is larger than the sum of its proper divisors (1).

79391795501 is an equidigital number, since it uses as much as digits as its factorization.

79391795501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2679075, while the sum is 56.

The spelling of 79391795501 in words is "seventy-nine billion, three hundred ninety-one million, seven hundred ninety-five thousand, five hundred one".