16885703025 has 27 divisors (see below), whose sum is σ = 30247661899. Its totient is φ = 9004668720.

The previous prime is 16885703011. The next prime is 16885703027. The reversal of 16885703025 is 52030758861.

The square root of 16885703025 is 129945.

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

It can be written as a sum of positive squares in only one way, i.e., 6078853089 + 10806849936 = 77967^2 + 103956^2 .

It is not a de Polignac number, because 16885703025 - 2⁵ = 16885702993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16885703027) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1944844 + ... + 1953506.

Almost surely, 2^16885703025 is an apocalyptic number.

16885703025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16885703025 is the 129945-th square number.

16885703025 is the 64973-rd centered octagonal number.

It is an amenable number.

16885703025 is a deficient number, since it is larger than the sum of its proper divisors (13361958874).

16885703025 is an frugal number, since it uses more digits than its factorization.

16885703025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17342 (or 8671 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 16885703025 in words is "sixteen billion, eight hundred eighty-five million, seven hundred three thousand, twenty-five".