561055601 has 4 divisors (see below), whose sum is σ = 561292452. Its totient is φ = 560818752.

The previous prime is 561055597. The next prime is 561055619. The reversal of 561055601 is 106550165.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49210225 + 511845376 = 7015^2 + 22624^2 .

It is a cyclic number.

It is not a de Polignac number, because 561055601 - 2² = 561055597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561055661) 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, 114836 + ... + 119621.

It is an arithmetic number, because the mean of its divisors is an integer number (140323113).

Almost surely, 2^561055601 is an apocalyptic number.

It is an amenable number.

561055601 is a deficient number, since it is larger than the sum of its proper divisors (236851).

561055601 is a wasteful number, since it uses less digits than its factorization.

561055601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236850.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 561055601 is about 23686.6122736030. The cubic root of 561055601 is about 824.7746435591.

The spelling of 561055601 in words is "five hundred sixty-one million, fifty-five thousand, six hundred one".