16798492881 has 15 divisors (see below), whose sum is σ = 25095787563. Its totient is φ = 11198217600.

The previous prime is 16798492873. The next prime is 16798492889. The reversal of 16798492881 is 18829489761.

The square root of 16798492881 is 129609.

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

16798492881 is a `hidden beast` number, since 1 + 67 + 9 + 8 + 492 + 8 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (16798492873) and next prime (16798492889).

It can be written as a sum of positive squares in only one way, i.e., 16793827281 + 4665600 = 129591^2 + 2160^2 .

It is not a de Polignac number, because 16798492881 - 2³ = 16798492873 is a prime.

It is a super-2 number, since 2×16798492881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16798492889) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1159281 + ... + 1173681.

Almost surely, 2^16798492881 is an apocalyptic number.

16798492881 is the 129609-th square number.

16798492881 is the 64805-th centered octagonal number.

It is an amenable number.

16798492881 is a deficient number, since it is larger than the sum of its proper divisors (8297294682).

16798492881 is an frugal number, since it uses more digits than its factorization.

16798492881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28814 (or 14404 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The spelling of 16798492881 in words is "sixteen billion, seven hundred ninety-eight million, four hundred ninety-two thousand, eight hundred eighty-one".