18645068557775 has 24 divisors (see below), whose sum is σ = 25230990355824. Its totient is φ = 13555051142400.

The previous prime is 18645068557699. The next prime is 18645068557793. The reversal of 18645068557775 is 57775586054681.

It is a happy number.

It is not a de Polignac number, because 18645068557775 - 2⁸ = 18645068557519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11749364 + ... + 13241513.

It is an arithmetic number, because the mean of its divisors is an integer number (1051291264826).

Almost surely, 2^{18645068557775} is an apocalyptic number.

18645068557775 is a deficient number, since it is larger than the sum of its proper divisors (6585921798049).

18645068557775 is a wasteful number, since it uses less digits than its factorization.

18645068557775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24993611 (or 24993606 counting only the distinct ones).

The product of its (nonzero) digits is 1975680000, while the sum is 74.

The spelling of 18645068557775 in words is "eighteen trillion, six hundred forty-five billion, sixty-eight million, five hundred fifty-seven thousand, seven hundred seventy-five".