18340440777 has 12 divisors (see below), whose sum is σ = 26639748720. Its totient is φ = 12158652408.

The previous prime is 18340440761. The next prime is 18340440799. The reversal of 18340440777 is 77704404381.

It is not a de Polignac number, because 18340440777 - 2⁴ = 18340440761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18340440737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5690643 + ... + 5693864.

It is an arithmetic number, because the mean of its divisors is an integer number (2219979060).

Almost surely, 2^18340440777 is an apocalyptic number.

It is an amenable number.

18340440777 is a deficient number, since it is larger than the sum of its proper divisors (8299307943).

18340440777 is a wasteful number, since it uses less digits than its factorization.

18340440777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11384692 (or 11384689 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The spelling of 18340440777 in words is "eighteen billion, three hundred forty million, four hundred forty thousand, seven hundred seventy-seven".