18396278951775 has 12 divisors (see below), whose sum is σ = 30415181200392. Its totient is φ = 9811348774240.

The previous prime is 18396278951749. The next prime is 18396278951807. The reversal of 18396278951775 is 57715987269381.

It is not a de Polignac number, because 18396278951775 - 2¹⁹ = 18396278427487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18396278951775.

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, 122641859604 + ... + 122641859753.

It is an arithmetic number, because the mean of its divisors is an integer number (2534598433366).

Almost surely, 2^{18396278951775} is an apocalyptic number.

18396278951775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18396278951775 is a deficient number, since it is larger than the sum of its proper divisors (12018902248617).

18396278951775 is a wasteful number, since it uses less digits than its factorization.

18396278951775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245283719370 (or 245283719365 counting only the distinct ones).

The product of its digits is 1600300800, while the sum is 78.

The spelling of 18396278951775 in words is "eighteen trillion, three hundred ninety-six billion, two hundred seventy-eight million, nine hundred fifty-one thousand, seven hundred seventy-five".