18463761665 has 16 divisors (see below), whose sum is σ = 22931030016. Its totient is φ = 14257156800.

The previous prime is 18463761661. The next prime is 18463761707. The reversal of 18463761665 is 56616736481.

It is not a de Polignac number, because 18463761665 - 2² = 18463761661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18463761661) 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, 96146 + ... + 214875.

It is an arithmetic number, because the mean of its divisors is an integer number (1433189376).

Almost surely, 2^18463761665 is an apocalyptic number.

It is an amenable number.

18463761665 is a deficient number, since it is larger than the sum of its proper divisors (4467268351).

18463761665 is a wasteful number, since it uses less digits than its factorization.

18463761665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311440.

The product of its digits is 4354560, while the sum is 53.

The spelling of 18463761665 in words is "eighteen billion, four hundred sixty-three million, seven hundred sixty-one thousand, six hundred sixty-five".