16398254885 has 8 divisors (see below), whose sum is σ = 20356454520. Its totient is φ = 12666238144.

The previous prime is 16398254879. The next prime is 16398254903. The reversal of 16398254885 is 58845289361.

It can be written as a sum of positive squares in 4 ways, for example, as 2520943681 + 13877311204 = 50209^2 + 117802^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16398254885 - 2¹⁴ = 16398238501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56545562 + ... + 56545851.

It is an arithmetic number, because the mean of its divisors is an integer number (2544556815).

Almost surely, 2^16398254885 is an apocalyptic number.

It is an amenable number.

16398254885 is a deficient number, since it is larger than the sum of its proper divisors (3958199635).

16398254885 is a wasteful number, since it uses less digits than its factorization.

16398254885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113091447.

The product of its digits is 16588800, while the sum is 59.

The spelling of 16398254885 in words is "sixteen billion, three hundred ninety-eight million, two hundred fifty-four thousand, eight hundred eighty-five".