581040934561 has 8 divisors (see below), whose sum is σ = 620000421920. Its totient is φ = 542919285792.

The previous prime is 581040934541. The next prime is 581040934597. The reversal of 581040934561 is 165439040185.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 581040934561 - 2²³ = 581032545953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (581040934531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209458215 + ... + 209460988.

It is an arithmetic number, because the mean of its divisors is an integer number (77500052740).

Almost surely, 2^581040934561 is an apocalyptic number.

It is an amenable number.

581040934561 is a deficient number, since it is larger than the sum of its proper divisors (38959487359).

581040934561 is a wasteful number, since it uses less digits than its factorization.

581040934561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418919295.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 581040934561 in words is "five hundred eighty-one billion, forty million, nine hundred thirty-four thousand, five hundred sixty-one".