18288745125 has 64 divisors (see below), whose sum is σ = 34813169664. Its totient is φ = 8352590400.

The previous prime is 18288745121. The next prime is 18288745147. The reversal of 18288745125 is 52154788281.

It is not a de Polignac number, because 18288745125 - 2² = 18288745121 is a prime.

It is a super-2 number, since 2×18288745125² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18288745121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3417702 + ... + 3423048.

It is an arithmetic number, because the mean of its divisors is an integer number (543955776).

Almost surely, 2^18288745125 is an apocalyptic number.

18288745125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18288745125 is a deficient number, since it is larger than the sum of its proper divisors (16524424539).

18288745125 is a wasteful number, since it uses less digits than its factorization.

18288745125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675 (or 6665 counting only the distinct ones).

The product of its digits is 1433600, while the sum is 51.

The spelling of 18288745125 in words is "eighteen billion, two hundred eighty-eight million, seven hundred forty-five thousand, one hundred twenty-five".