79690420769 has 8 divisors (see below), whose sum is σ = 83342941632. Its totient is φ = 76053543280.

The previous prime is 79690420739. The next prime is 79690420867. The reversal of 79690420769 is 96702409697.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79690420769 is a prime.

It is a super-2 number, since 2×79690420769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79690420729) 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 in 7 ways as a sum of consecutive naturals, for example, 3900422 + ... + 3920799.

It is an arithmetic number, because the mean of its divisors is an integer number (10417867704).

Almost surely, 2^79690420769 is an apocalyptic number.

It is an amenable number.

79690420769 is a deficient number, since it is larger than the sum of its proper divisors (3652520863).

79690420769 is a wasteful number, since it uses less digits than its factorization.

79690420769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821687.

The product of its (nonzero) digits is 10287648, while the sum is 59.

The spelling of 79690420769 in words is "seventy-nine billion, six hundred ninety million, four hundred twenty thousand, seven hundred sixty-nine".