561554195 has 4 divisors (see below), whose sum is σ = 673865040. Its totient is φ = 449243352.

The previous prime is 561554171. The next prime is 561554197. The reversal of 561554195 is 591455165.

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 561554195 - 2¹⁰ = 561553171 is a prime.

It is a super-2 number, since 2×561554195² = 630686227844196050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561554197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56155415 + ... + 56155424.

It is an arithmetic number, because the mean of its divisors is an integer number (168466260).

Almost surely, 2^561554195 is an apocalyptic number.

561554195 is a deficient number, since it is larger than the sum of its proper divisors (112310845).

561554195 is a wasteful number, since it uses less digits than its factorization.

561554195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112310844.

The product of its digits is 135000, while the sum is 41.

The square root of 561554195 is about 23697.1347424114. The cubic root of 561554195 is about 825.0188890686.

The spelling of 561554195 in words is "five hundred sixty-one million, five hundred fifty-four thousand, one hundred ninety-five".