561375055 has 8 divisors (see below), whose sum is σ = 676542672. Its totient is φ = 447171648.

The previous prime is 561375049. The next prime is 561375077. The reversal of 561375055 is 550573165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561375055 - 2⁹ = 561374543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239769 + ... + 242098.

It is an arithmetic number, because the mean of its divisors is an integer number (84567834).

Almost surely, 2^561375055 is an apocalyptic number.

561375055 is a deficient number, since it is larger than the sum of its proper divisors (115167617).

561375055 is a wasteful number, since it uses less digits than its factorization.

561375055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482105.

The product of its (nonzero) digits is 78750, while the sum is 37.

The square root of 561375055 is about 23693.3546590600. The cubic root of 561375055 is about 824.9311506670.

The spelling of 561375055 in words is "five hundred sixty-one million, three hundred seventy-five thousand, fifty-five".