561182494 has 4 divisors (see below), whose sum is σ = 841773744. Its totient is φ = 280591246.

The previous prime is 561182459. The next prime is 561182507. The reversal of 561182494 is 494281165.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140295622 + ... + 140295625.

It is an arithmetic number, because the mean of its divisors is an integer number (210443436).

Almost surely, 2^561182494 is an apocalyptic number.

561182494 is a deficient number, since it is larger than the sum of its proper divisors (280591250).

561182494 is a wasteful number, since it uses less digits than its factorization.

561182494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280591249.

The product of its digits is 69120, while the sum is 40.

The square root of 561182494 is about 23689.2907027627. The cubic root of 561182494 is about 824.8368181692.

The spelling of 561182494 in words is "five hundred sixty-one million, one hundred eighty-two thousand, four hundred ninety-four".