1818745981716 has 24 divisors (see below), whose sum is σ = 4493372425920. Its totient is φ = 570586974592.

The previous prime is 1818745981673. The next prime is 1818745981751. The reversal of 1818745981716 is 6171895478181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4457710536 + ... + 4457710943.

It is an arithmetic number, because the mean of its divisors is an integer number (187223851080).

Almost surely, 2^{1818745981716} is an apocalyptic number.

It is an amenable number.

1818745981716 is an abundant number, since it is smaller than the sum of its proper divisors (2674626444204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818745981716 is a wasteful number, since it uses less digits than its factorization.

1818745981716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915421503 (or 8915421501 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 66.

The spelling of 1818745981716 in words is "one trillion, eight hundred eighteen billion, seven hundred forty-five million, nine hundred eighty-one thousand, seven hundred sixteen".