989814738455 has 4 divisors (see below), whose sum is σ = 1187777686152. Its totient is φ = 791851790760.

The previous prime is 989814738439. The next prime is 989814738457. The reversal of 989814738455 is 554837418989.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 989814738455 - 2⁴ = 989814738439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989814738457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98981473841 + ... + 98981473850.

It is an arithmetic number, because the mean of its divisors is an integer number (296944421538).

Almost surely, 2^989814738455 is an apocalyptic number.

989814738455 is a deficient number, since it is larger than the sum of its proper divisors (197962947697).

989814738455 is a wasteful number, since it uses less digits than its factorization.

989814738455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197962947696.

The product of its digits is 348364800, while the sum is 71.

The spelling of 989814738455 in words is "nine hundred eighty-nine billion, eight hundred fourteen million, seven hundred thirty-eight thousand, four hundred fifty-five".