79942721761346 has 8 divisors (see below), whose sum is σ = 123155003794620. Its totient is φ = 38891053829808.

The previous prime is 79942721761327. The next prime is 79942721761373. The reversal of 79942721761346 is 64316712724997.

It can be written as a sum of positive squares in 2 ways, for example, as 77174028765625 + 2768692995721 = 8784875^2 + 1663939^2 .

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

It is a super-2 number, since 2×79942721761346² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540153525341 + ... + 540153525488.

Almost surely, 2^{79942721761346} is an apocalyptic number.

79942721761346 is a deficient number, since it is larger than the sum of its proper divisors (43212282033274).

79942721761346 is a wasteful number, since it uses less digits than its factorization.

79942721761346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080307050868.

The product of its digits is 192036096, while the sum is 68.

The spelling of 79942721761346 in words is "seventy-nine trillion, nine hundred forty-two billion, seven hundred twenty-one million, seven hundred sixty-one thousand, three hundred forty-six".