18195765775 has 12 divisors (see below), whose sum is σ = 24613908984. Its totient is φ = 13233284000.

The previous prime is 18195765767. The next prime is 18195765787. The reversal of 18195765775 is 57756759181.

It is not a de Polignac number, because 18195765775 - 2³ = 18195765767 is a prime.

It is a super-2 number, since 2×18195765775² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33082936 + ... + 33083485.

It is an arithmetic number, because the mean of its divisors is an integer number (2051159082).

Almost surely, 2^18195765775 is an apocalyptic number.

18195765775 is a deficient number, since it is larger than the sum of its proper divisors (6418143209).

18195765775 is a wasteful number, since it uses less digits than its factorization.

18195765775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66166442 (or 66166437 counting only the distinct ones).

The product of its digits is 18522000, while the sum is 61.

The spelling of 18195765775 in words is "eighteen billion, one hundred ninety-five million, seven hundred sixty-five thousand, seven hundred seventy-five".