591042781420 has 144 divisors (see below), whose sum is σ = 1563589772640. Its totient is φ = 186009578496.

The previous prime is 591042781397. The next prime is 591042781423. The reversal of 591042781420 is 24187240195.

It is not an unprimeable number, because it can be changed into a prime (591042781423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2150872 + ... + 2410048.

It is an arithmetic number, because the mean of its divisors is an integer number (10858262310).

Almost surely, 2^591042781420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 591042781420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781794886320).

591042781420 is an abundant number, since it is smaller than the sum of its proper divisors (972546991220).

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

591042781420 is a wasteful number, since it uses less digits than its factorization.

591042781420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259392 (or 259383 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 591042781420 in words is "five hundred ninety-one billion, forty-two million, seven hundred eighty-one thousand, four hundred twenty".