18598266225 has 336 divisors, whose sum is σ = 44693032320. Its totient is φ = 7446297600.

The previous prime is 18598266163. The next prime is 18598266229. The reversal of 18598266225 is 52266289581.

18598266225 is a `hidden beast` number, since 1 + 8 + 5 + 9 + 8 + 2 + 6 + 622 + 5 = 666.

It is not a de Polignac number, because 18598266225 - 2⁶ = 18598266161 is a prime.

Its product of digits (4147200) is a multiple of the sum of its prime divisors (512).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18598266229) by changing a digit.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 40696197 + ... + 40696653.

Almost surely, 2^18598266225 is an apocalyptic number.

18598266225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18598266225 is an abundant number, since it is smaller than the sum of its proper divisors (26094766095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18598266225 is a wasteful number, since it uses less digits than its factorization.

18598266225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 512 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 18598266225 in words is "eighteen billion, five hundred ninety-eight million, two hundred sixty-six thousand, two hundred twenty-five".