561948803 has 12 divisors (see below), whose sum is σ = 608615280. Its totient is φ = 515786352.

The previous prime is 561948799. The next prime is 561948809. The reversal of 561948803 is 308849165.

It is not a de Polignac number, because 561948803 - 2² = 561948799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561948809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565138 + ... + 1565496.

It is an arithmetic number, because the mean of its divisors is an integer number (50717940).

Almost surely, 2^561948803 is an apocalyptic number.

561948803 is a deficient number, since it is larger than the sum of its proper divisors (46666477).

561948803 is an equidigital number, since it uses as much as digits as its factorization.

561948803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 561948803 is about 23705.4593501160. The cubic root of 561948803 is about 825.2120926388.

The spelling of 561948803 in words is "five hundred sixty-one million, nine hundred forty-eight thousand, eight hundred three".