16849338025 has 27 divisors (see below), whose sum is σ = 22635309711. Its totient is φ = 12436357440.

The previous prime is 16849338007. The next prime is 16849338041. The reversal of 16849338025 is 52083394861.

The square root of 16849338025 is 129805.

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

It can be written as a sum of positive squares in 13 ways, for example, as 14599163929 + 2250174096 = 120827^2 + 47436^2 .

It is not a de Polignac number, because 16849338025 - 2⁹ = 16849337513 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 16849338025.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8436327 + ... + 8438323.

Almost surely, 2^16849338025 is an apocalyptic number.

16849338025 is the 129805-th square number.

16849338025 is the 64903-rd centered octagonal number.

It is an amenable number.

16849338025 is a deficient number, since it is larger than the sum of its proper divisors (5785971686).

16849338025 is an frugal number, since it uses more digits than its factorization.

16849338025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030 (or 2015 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

Multiplying 16849338025 by its sum of digits (49), we get a square (825617563225 = 908635²).

The spelling of 16849338025 in words is "sixteen billion, eight hundred forty-nine million, three hundred thirty-eight thousand, twenty-five".