789434421455 has 4 divisors (see below), whose sum is σ = 947321305752. Its totient is φ = 631547537160.

The previous prime is 789434421449. The next prime is 789434421481. The reversal of 789434421455 is 554124434987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554124434987 = 53881 ⋅10284227.

It is not a de Polignac number, because 789434421455 - 2⁸ = 789434421199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 789434421455.

It is a congruent number.

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, 78943442141 + ... + 78943442150.

It is an arithmetic number, because the mean of its divisors is an integer number (236830326438).

Almost surely, 2^789434421455 is an apocalyptic number.

789434421455 is a deficient number, since it is larger than the sum of its proper divisors (157886884297).

789434421455 is a wasteful number, since it uses less digits than its factorization.

789434421455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157886884296.

The product of its digits is 19353600, while the sum is 56.

The spelling of 789434421455 in words is "seven hundred eighty-nine billion, four hundred thirty-four million, four hundred twenty-one thousand, four hundred fifty-five".