79291066813 has 8 divisors (see below), whose sum is σ = 92467716800. Its totient is φ = 67963771260.

The previous prime is 79291066787. The next prime is 79291066831. The reversal of 79291066813 is 31866019297.

It is a happy number.

It is not a de Polignac number, because 79291066813 - 2¹⁷ = 79290935741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79291066873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115584303 + ... + 115584988.

It is an arithmetic number, because the mean of its divisors is an integer number (11558464600).

Almost surely, 2^79291066813 is an apocalyptic number.

It is an amenable number.

79291066813 is a deficient number, since it is larger than the sum of its proper divisors (13176649987).

79291066813 is an equidigital number, since it uses as much as digits as its factorization.

79291066813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231169312 (or 231169298 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 79291066813 in words is "seventy-nine billion, two hundred ninety-one million, sixty-six thousand, eight hundred thirteen".