18264142416781 has 4 divisors (see below), whose sum is σ = 18434835336672. Its totient is φ = 18093449496892.

The previous prime is 18264142416713. The next prime is 18264142416791. The reversal of 18264142416781 is 18761424146281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18264142416781 - 2²⁷ = 18264008199053 is a prime.

It is a super-2 number, since 2×18264142416781² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18264142416791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85346459785 + ... + 85346459998.

It is an arithmetic number, because the mean of its divisors is an integer number (4608708834168).

Almost surely, 2^{18264142416781} is an apocalyptic number.

It is an amenable number.

18264142416781 is a deficient number, since it is larger than the sum of its proper divisors (170692919891).

18264142416781 is a wasteful number, since it uses less digits than its factorization.

18264142416781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170692919890.

The product of its digits is 4128768, while the sum is 55.

The spelling of 18264142416781 in words is "eighteen trillion, two hundred sixty-four billion, one hundred forty-two million, four hundred sixteen thousand, seven hundred eighty-one".