18454387775 has 6 divisors (see below), whose sum is σ = 22883440872. Its totient is φ = 14763510200.

The previous prime is 18454387753. The next prime is 18454387817. The reversal of 18454387775 is 57778345481.

It is a happy number.

It is not a de Polignac number, because 18454387775 - 2⁶ = 18454387711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 369087731 + ... + 369087780.

It is an arithmetic number, because the mean of its divisors is an integer number (3813906812).

Almost surely, 2^18454387775 is an apocalyptic number.

18454387775 is a deficient number, since it is larger than the sum of its proper divisors (4429053097).

18454387775 is an equidigital number, since it uses as much as digits as its factorization.

18454387775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738175521 (or 738175516 counting only the distinct ones).

The product of its digits is 26342400, while the sum is 59.

The spelling of 18454387775 in words is "eighteen billion, four hundred fifty-four million, three hundred eighty-seven thousand, seven hundred seventy-five".