18725612265 has 128 divisors (see below), whose sum is σ = 35836416000. Its totient is φ = 9254310912.

The previous prime is 18725612263. The next prime is 18725612287. The reversal of 18725612265 is 56221652781.

18725612265 is a `hidden beast` number, since 1 + 8 + 7 + 2 + 5 + 612 + 26 + 5 = 666.

It is not a de Polignac number, because 18725612265 - 2¹ = 18725612263 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18725612265.

It is not an unprimeable number, because it can be changed into a prime (18725612263) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18558081 + ... + 18559089.

It is an arithmetic number, because the mean of its divisors is an integer number (279972000).

Almost surely, 2^18725612265 is an apocalyptic number.

18725612265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18725612265 is a deficient number, since it is larger than the sum of its proper divisors (17110803735).

18725612265 is a wasteful number, since it uses less digits than its factorization.

18725612265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1222 counting only the distinct ones).

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

The spelling of 18725612265 in words is "eighteen billion, seven hundred twenty-five million, six hundred twelve thousand, two hundred sixty-five".