561275791 has 8 divisors (see below), whose sum is σ = 604365840. Its totient is φ = 519305088.

The previous prime is 561275761. The next prime is 561275809. The reversal of 561275791 is 197572165.

561275791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 561275791 - 2¹³ = 561267599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561275761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278796 + ... + 280801.

It is an arithmetic number, because the mean of its divisors is an integer number (75545730).

Almost surely, 2^561275791 is an apocalyptic number.

561275791 is a deficient number, since it is larger than the sum of its proper divisors (43090049).

561275791 is a wasteful number, since it uses less digits than its factorization.

561275791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559673.

The product of its digits is 132300, while the sum is 43.

The square root of 561275791 is about 23691.2598018763. The cubic root of 561275791 is about 824.8825255444.

The spelling of 561275791 in words is "five hundred sixty-one million, two hundred seventy-five thousand, seven hundred ninety-one".