5781489820 has 12 divisors (see below), whose sum is σ = 12141128664. Its totient is φ = 2312595920.

The previous prime is 5781489817. The next prime is 5781489823. The reversal of 5781489820 is 289841875.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5781489817) and next prime (5781489823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5781489823) 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, 144537226 + ... + 144537265.

It is an arithmetic number, because the mean of its divisors is an integer number (1011760722).

Almost surely, 2^5781489820 is an apocalyptic number.

It is an amenable number.

5781489820 is an abundant number, since it is smaller than the sum of its proper divisors (6359638844).

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

5781489820 is a wasteful number, since it uses less digits than its factorization.

5781489820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289074500 (or 289074498 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 52.

The square root of 5781489820 is about 76036.1086589786. The cubic root of 5781489820 is about 1794.7884046947.

The spelling of 5781489820 in words is "five billion, seven hundred eighty-one million, four hundred eighty-nine thousand, eight hundred twenty".