18413976777 has 16 divisors (see below), whose sum is σ = 28122746880. Its totient is φ = 10498514832.

The previous prime is 18413976773. The next prime is 18413976839. The reversal of 18413976777 is 77767931481.

It is a happy number.

It is not a de Polignac number, because 18413976777 - 2² = 18413976773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18413976777.

It is not an unprimeable number, because it can be changed into a prime (18413976773) 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, 980377 + ... + 998982.

It is an arithmetic number, because the mean of its divisors is an integer number (1757671680).

Almost surely, 2^18413976777 is an apocalyptic number.

It is an amenable number.

18413976777 is a deficient number, since it is larger than the sum of its proper divisors (9708770103).

18413976777 is a wasteful number, since it uses less digits than its factorization.

18413976777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979812.

The product of its digits is 12446784, while the sum is 60.

The spelling of 18413976777 in words is "eighteen billion, four hundred thirteen million, nine hundred seventy-six thousand, seven hundred seventy-seven".