581238685441 has 4 divisors (see below), whose sum is σ = 581241097984. Its totient is φ = 581236272900.

The previous prime is 581238685277. The next prime is 581238685463. The reversal of 581238685441 is 144586832185.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144586832185 = 5 ⋅28917366437.

It is a cyclic number.

It is not a de Polignac number, because 581238685441 - 2²⁵ = 581205131009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (581238685481) 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, 799065 + ... + 1342006.

It is an arithmetic number, because the mean of its divisors is an integer number (145310274496).

Almost surely, 2^581238685441 is an apocalyptic number.

It is an amenable number.

581238685441 is a deficient number, since it is larger than the sum of its proper divisors (2412543).

581238685441 is a wasteful number, since it uses less digits than its factorization.

581238685441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412542.

The product of its digits is 7372800, while the sum is 55.

The spelling of 581238685441 in words is "five hundred eighty-one billion, two hundred thirty-eight million, six hundred eighty-five thousand, four hundred forty-one".