561260765 has 16 divisors (see below), whose sum is σ = 729388800. Its totient is φ = 412145472.

The previous prime is 561260761. The next prime is 561260813. The reversal of 561260765 is 567062165.

It is a cyclic number.

It is not a de Polignac number, because 561260765 - 2² = 561260761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561260761) 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, 12485 + ... + 35754.

It is an arithmetic number, because the mean of its divisors is an integer number (45586800).

Almost surely, 2^561260765 is an apocalyptic number.

It is an amenable number.

561260765 is a deficient number, since it is larger than the sum of its proper divisors (168128035).

561260765 is a wasteful number, since it uses less digits than its factorization.

561260765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48436.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 561260765 is about 23690.9426785850. The cubic root of 561260765 is about 824.8751644600.

The spelling of 561260765 in words is "five hundred sixty-one million, two hundred sixty thousand, seven hundred sixty-five".