561434945 has 16 divisors (see below), whose sum is σ = 744370560. Its totient is φ = 404346624.

The previous prime is 561434941. The next prime is 561434969. The reversal of 561434945 is 549434165.

It is not a de Polignac number, because 561434945 - 2² = 561434941 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (561434941) 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 15 ways as a sum of consecutive naturals, for example, 141635 + ... + 145544.

It is an arithmetic number, because the mean of its divisors is an integer number (46523160).

Almost surely, 2^561434945 is an apocalyptic number.

It is an amenable number.

561434945 is a deficient number, since it is larger than the sum of its proper divisors (182935615).

561434945 is a wasteful number, since it uses less digits than its factorization.

561434945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287224.

The product of its digits is 259200, while the sum is 41.

The square root of 561434945 is about 23694.6184818410. The cubic root of 561434945 is about 824.9604854046.

The spelling of 561434945 in words is "five hundred sixty-one million, four hundred thirty-four thousand, nine hundred forty-five".