5781818840 has 32 divisors (see below), whose sum is σ = 14867534880. Its totient is φ = 1982337792.

The previous prime is 5781818771. The next prime is 5781818857. The reversal of 5781818840 is 488181875.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 10324397 + ... + 10324956.

It is an arithmetic number, because the mean of its divisors is an integer number (464610465).

Almost surely, 2^5781818840 is an apocalyptic number.

It is an amenable number.

5781818840 is an abundant number, since it is smaller than the sum of its proper divisors (9085716040).

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

5781818840 is a wasteful number, since it uses less digits than its factorization.

5781818840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20649371 (or 20649367 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 50.

The square root of 5781818840 is about 76038.2722055150. The cubic root of 5781818840 is about 1794.8224507104.

The spelling of 5781818840 in words is "five billion, seven hundred eighty-one million, eight hundred eighteen thousand, eight hundred forty".