79428664443 has 16 divisors (see below), whose sum is σ = 112268298240. Its totient is φ = 49778165376.

The previous prime is 79428664429. The next prime is 79428664517. The reversal of 79428664443 is 34446682497.

It is not a de Polignac number, because 79428664443 - 2¹² = 79428660347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79428664643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 885355 + ... + 970932.

It is an arithmetic number, because the mean of its divisors is an integer number (7016768640).

Almost surely, 2^79428664443 is an apocalyptic number.

79428664443 is a deficient number, since it is larger than the sum of its proper divisors (32839633797).

79428664443 is a wasteful number, since it uses less digits than its factorization.

79428664443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857146.

The product of its digits is 27869184, while the sum is 57.

The spelling of 79428664443 in words is "seventy-nine billion, four hundred twenty-eight million, six hundred sixty-four thousand, four hundred forty-three".