18045644975 has 12 divisors (see below), whose sum is σ = 22390892040. Its totient is φ = 14427295200.

The previous prime is 18045644963. The next prime is 18045644983. The reversal of 18045644975 is 57944654081.

It is a happy number.

It is not a de Polignac number, because 18045644975 - 2¹⁴ = 18045628591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190460 + ... + 269009.

It is an arithmetic number, because the mean of its divisors is an integer number (1865907670).

Almost surely, 2^18045644975 is an apocalyptic number.

18045644975 is a deficient number, since it is larger than the sum of its proper divisors (4345247065).

18045644975 is a wasteful number, since it uses less digits than its factorization.

18045644975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461050 (or 461045 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 18045644975 in words is "eighteen billion, forty-five million, six hundred forty-four thousand, nine hundred seventy-five".