8561490263 has 4 divisors (see below), whose sum is σ = 8574137160. Its totient is φ = 8548843368.

The previous prime is 8561490253. The next prime is 8561490271. The reversal of 8561490263 is 3620941658.

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 8561490263 - 2⁴ = 8561490247 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 (8561490253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6322433 + ... + 6323786.

It is an arithmetic number, because the mean of its divisors is an integer number (2143534290).

Almost surely, 2^8561490263 is an apocalyptic number.

8561490263 is a deficient number, since it is larger than the sum of its proper divisors (12646897).

8561490263 is a wasteful number, since it uses less digits than its factorization.

8561490263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12646896.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 8561490263 is about 92528.3214102580. The cubic root of 8561490263 is about 2045.7369480676.

The spelling of 8561490263 in words is "eight billion, five hundred sixty-one million, four hundred ninety thousand, two hundred sixty-three".