56581420111 has 8 divisors (see below), whose sum is σ = 57342032384. Its totient is φ = 55825731360.

The previous prime is 56581420109. The next prime is 56581420171. The reversal of 56581420111 is 11102418565.

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 56581420111 - 2¹ = 56581420109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56581420171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207740 + ... + 1253713.

It is an arithmetic number, because the mean of its divisors is an integer number (7167754048).

Almost surely, 2^56581420111 is an apocalyptic number.

56581420111 is a deficient number, since it is larger than the sum of its proper divisors (760612273).

56581420111 is a wasteful number, since it uses less digits than its factorization.

56581420111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461761.

The product of its (nonzero) digits is 9600, while the sum is 34.

Adding to 56581420111 its reverse (11102418565), we get a palindrome (67683838676).

The spelling of 56581420111 in words is "fifty-six billion, five hundred eighty-one million, four hundred twenty thousand, one hundred eleven".