561257559 has 16 divisors (see below), whose sum is σ = 833603040. Its totient is φ = 373222080.

The previous prime is 561257527. The next prime is 561257563. The reversal of 561257559 is 955752165.

It is not a de Polignac number, because 561257559 - 2⁵ = 561257527 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561257509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15462 + ... + 36899.

It is an arithmetic number, because the mean of its divisors is an integer number (52100190).

Almost surely, 2^561257559 is an apocalyptic number.

561257559 is a deficient number, since it is larger than the sum of its proper divisors (272345481).

561257559 is a wasteful number, since it uses less digits than its factorization.

561257559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52767 (or 52761 counting only the distinct ones).

The product of its digits is 472500, while the sum is 45.

The square root of 561257559 is about 23690.8750154991. The cubic root of 561257559 is about 824.8735938562.

The spelling of 561257559 in words is "five hundred sixty-one million, two hundred fifty-seven thousand, five hundred fifty-nine".