561172358 has 4 divisors (see below), whose sum is σ = 841758540. Its totient is φ = 280586178.

The previous prime is 561172357. The next prime is 561172373. The reversal of 561172358 is 853271165.

561172358 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561172357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140293088 + ... + 140293091.

It is an arithmetic number, because the mean of its divisors is an integer number (210439635).

Almost surely, 2^561172358 is an apocalyptic number.

561172358 is a deficient number, since it is larger than the sum of its proper divisors (280586182).

561172358 is a wasteful number, since it uses less digits than its factorization.

561172358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280586181.

The product of its digits is 50400, while the sum is 38.

The square root of 561172358 is about 23689.0767654630. The cubic root of 561172358 is about 824.8318521101.

The spelling of 561172358 in words is "five hundred sixty-one million, one hundred seventy-two thousand, three hundred fifty-eight".