16516245225 has 24 divisors (see below), whose sum is σ = 27521889280. Its totient is φ = 8739299520.

The previous prime is 16516245223. The next prime is 16516245227. The reversal of 16516245225 is 52254261561.

It is an interprime number because it is at equal distance from previous prime (16516245223) and next prime (16516245227).

It is not a de Polignac number, because 16516245225 - 2¹ = 16516245223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16516245223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 857470 + ... + 876519.

Almost surely, 2^16516245225 is an apocalyptic number.

16516245225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16516245225 is a deficient number, since it is larger than the sum of its proper divisors (11005644055).

16516245225 is a wasteful number, since it uses less digits than its factorization.

16516245225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734129 (or 1734124 counting only the distinct ones).

The product of its digits is 144000, while the sum is 39.

The spelling of 16516245225 in words is "sixteen billion, five hundred sixteen million, two hundred forty-five thousand, two hundred twenty-five".