18116743497 has 16 divisors (see below), whose sum is σ = 25460101440. Its totient is φ = 11441323712.

The previous prime is 18116743427. The next prime is 18116743499. The reversal of 18116743497 is 79434761181.

It is a cyclic number.

It is not a de Polignac number, because 18116743497 - 2²⁶ = 18049634633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18116743499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1959903 + ... + 1969124.

It is an arithmetic number, because the mean of its divisors is an integer number (1591256340).

Almost surely, 2^18116743497 is an apocalyptic number.

It is an amenable number.

18116743497 is a deficient number, since it is larger than the sum of its proper divisors (7343357943).

18116743497 is a wasteful number, since it uses less digits than its factorization.

18116743497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929112.

The product of its digits is 1016064, while the sum is 51.

The spelling of 18116743497 in words is "eighteen billion, one hundred sixteen million, seven hundred forty-three thousand, four hundred ninety-seven".