79442647193 has 32 divisors (see below), whose sum is σ = 99664061952. Its totient is φ = 61651238400.

The previous prime is 79442647187. The next prime is 79442647231. The reversal of 79442647193 is 39174624497.

It is a cyclic number.

It is not a de Polignac number, because 79442647193 - 2⁴ = 79442647177 is a prime.

It is a super-2 number, since 2×79442647193² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79442646193) 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 in 31 ways as a sum of consecutive naturals, for example, 1169348 + ... + 1235418.

It is an arithmetic number, because the mean of its divisors is an integer number (3114501936).

Almost surely, 2^79442647193 is an apocalyptic number.

79442647193 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

79442647193 is a deficient number, since it is larger than the sum of its proper divisors (20221414759).

79442647193 is a wasteful number, since it uses less digits than its factorization.

79442647193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66345.

The product of its digits is 9144576, while the sum is 56.

The spelling of 79442647193 in words is "seventy-nine billion, four hundred forty-two million, six hundred forty-seven thousand, one hundred ninety-three".