16619592889 has 9 divisors (see below), whose sum is σ = 16759599661. Its totient is φ = 16480749280.

The previous prime is 16619592877. The next prime is 16619592901. The reversal of 16619592889 is 98829591661.

The square root of 16619592889 is 128917.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (16619592877) and next prime (16619592901).

It can be written as a sum of positive squares in 4 ways, for example, as 716365225 + 15903227664 = 26765^2 + 126108^2 .

It is not a de Polignac number, because 16619592889 - 2¹⁹ = 16619068601 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 16619592889.

It is not an unprimeable number, because it can be changed into a prime (16619542889) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17661159 + ... + 17662099.

Almost surely, 2^16619592889 is an apocalyptic number.

16619592889 is the 128917-th square number.

16619592889 is the 64459-th centered octagonal number.

It is an amenable number.

16619592889 is a deficient number, since it is larger than the sum of its proper divisors (140006772).

16619592889 is an frugal number, since it uses more digits than its factorization.

16619592889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156 (or 1078 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 64.

Multiplying 16619592889 by its sum of digits (64), we get a square (1063653944896 = 1031336²).

The spelling of 16619592889 in words is "sixteen billion, six hundred nineteen million, five hundred ninety-two thousand, eight hundred eighty-nine".