16798890836025 has 45 divisors (see below), whose sum is σ = 31117694500893. Its totient is φ = 8959310078400.

The previous prime is 16798890836011. The next prime is 16798890836027. The reversal of 16798890836025 is 52063809889761.

The square root of 16798890836025 is 4098645.

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

16798890836025 is a `hidden beast` number, since 1 + 6 + 7 + 9 + 8 + 8 + 9 + 0 + 8 + 3 + 602 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 191342380329 + 16607548455696 = 437427^2 + 4075236^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 16798890836025 - 2⁷ = 16798890835897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16798890836027) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 184393485 + ... + 184484565.

Almost surely, 2^{16798890836025} is an apocalyptic number.

16798890836025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16798890836025 is the 4098645-th square number.

16798890836025 is the 2049323-rd centered octagonal number.

It is an amenable number.

16798890836025 is a deficient number, since it is larger than the sum of its proper divisors (14318803664868).

16798890836025 is an frugal number, since it uses more digits than its factorization.

16798890836025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182184 (or 91089 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 72.

The spelling of 16798890836025 in words is "sixteen trillion, seven hundred ninety-eight billion, eight hundred ninety million, eight hundred thirty-six thousand, twenty-five".