18616980945 has 8 divisors (see below), whose sum is σ = 29787169536. Its totient is φ = 9929056496.

The previous prime is 18616980917. The next prime is 18616981003. The reversal of 18616980945 is 54908961681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18616980945 - 2⁹ = 18616980433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620566017 + ... + 620566046.

It is an arithmetic number, because the mean of its divisors is an integer number (3723396192).

Almost surely, 2^18616980945 is an apocalyptic number.

18616980945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18616980945 is a deficient number, since it is larger than the sum of its proper divisors (11170188591).

18616980945 is a wasteful number, since it uses less digits than its factorization.

18616980945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241132071.

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 18616980945 in words is "eighteen billion, six hundred sixteen million, nine hundred eighty thousand, nine hundred forty-five".