18078205255 has 48 divisors (see below), whose sum is σ = 24470433792. Its totient is φ = 12805848000.

The previous prime is 18078205237. The next prime is 18078205261. The reversal of 18078205255 is 55250287081.

It is a de Polignac number, because none of the positive numbers 2^k-18078205255 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6339580 + ... + 6342430.

It is an arithmetic number, because the mean of its divisors is an integer number (509800704).

Almost surely, 2^18078205255 is an apocalyptic number.

18078205255 is a deficient number, since it is larger than the sum of its proper divisors (6392228537).

18078205255 is a wasteful number, since it uses less digits than its factorization.

18078205255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 43.

The spelling of 18078205255 in words is "eighteen billion, seventy-eight million, two hundred five thousand, two hundred fifty-five".