561457748587 has 4 divisors (see below), whose sum is σ = 579569288896. Its totient is φ = 543346208280.

The previous prime is 561457748563. The next prime is 561457748591. The reversal of 561457748587 is 785847754165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561457748587 - 2⁷ = 561457748459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561457748287) 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, 9055770108 + ... + 9055770169.

It is an arithmetic number, because the mean of its divisors is an integer number (144892322224).

Almost surely, 2^561457748587 is an apocalyptic number.

561457748587 is a deficient number, since it is larger than the sum of its proper divisors (18111540309).

561457748587 is a wasteful number, since it uses less digits than its factorization.

561457748587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18111540308.

The product of its digits is 263424000, while the sum is 67.

The spelling of 561457748587 in words is "five hundred sixty-one billion, four hundred fifty-seven million, seven hundred forty-eight thousand, five hundred eighty-seven".