79442944453 has 4 divisors (see below), whose sum is σ = 79623908320. Its totient is φ = 79261980588.

The previous prime is 79442944429. The next prime is 79442944517. The reversal of 79442944453 is 35444924497.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79442944453 - 2³³ = 70853009861 is a prime.

It is a super-2 number, since 2×79442944453² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79442944394 and 79442944403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79442944853) 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 3 ways as a sum of consecutive naturals, for example, 90481275 + ... + 90482152.

It is an arithmetic number, because the mean of its divisors is an integer number (19905977080).

Almost surely, 2^79442944453 is an apocalyptic number.

It is an amenable number.

79442944453 is a deficient number, since it is larger than the sum of its proper divisors (180963867).

79442944453 is a wasteful number, since it uses less digits than its factorization.

79442944453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180963866.

The product of its digits is 17418240, while the sum is 55.

The spelling of 79442944453 in words is "seventy-nine billion, four hundred forty-two million, nine hundred forty-four thousand, four hundred fifty-three".