18601692745 has 4 divisors (see below), whose sum is σ = 22322031300. Its totient is φ = 14881354192.

The previous prime is 18601692713. The next prime is 18601692779. The reversal of 18601692745 is 54729610681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9782792464 + 8818900281 = 98908^2 + 93909^2 .

It is a cyclic number.

It is not a de Polignac number, because 18601692745 - 2⁵ = 18601692713 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1860169270 + ... + 1860169279.

It is an arithmetic number, because the mean of its divisors is an integer number (5580507825).

Almost surely, 2^18601692745 is an apocalyptic number.

It is an amenable number.

18601692745 is a deficient number, since it is larger than the sum of its proper divisors (3720338555).

18601692745 is an equidigital number, since it uses as much as digits as its factorization.

18601692745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720338554.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 18601692745 in words is "eighteen billion, six hundred one million, six hundred ninety-two thousand, seven hundred forty-five".