18112320777 has 16 divisors (see below), whose sum is σ = 24339093120. Its totient is φ = 11980309632.

The previous prime is 18112320763. The next prime is 18112320781. The reversal of 18112320777 is 77702321181.

It is not a de Polignac number, because 18112320777 - 2⁸ = 18112320521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18112320077) 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, 827223 + ... + 848835.

It is an arithmetic number, because the mean of its divisors is an integer number (1521193320).

Almost surely, 2^18112320777 is an apocalyptic number.

It is an amenable number.

18112320777 is a deficient number, since it is larger than the sum of its proper divisors (6226772343).

18112320777 is a wasteful number, since it uses less digits than its factorization.

18112320777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23792.

The product of its (nonzero) digits is 32928, while the sum is 39.

The spelling of 18112320777 in words is "eighteen billion, one hundred twelve million, three hundred twenty thousand, seven hundred seventy-seven".