561765756 has 48 divisors (see below), whose sum is σ = 1357260800. Its totient is φ = 180653760.

The previous prime is 561765751. The next prime is 561765769. The reversal of 561765756 is 657567165.

It is a super-2 number, since 2×561765756² = 631161529228503072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561765751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127665 + ... + 131991.

Almost surely, 2^561765756 is an apocalyptic number.

It is an amenable number.

561765756 is an abundant number, since it is smaller than the sum of its proper divisors (795495044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561765756 is a wasteful number, since it uses less digits than its factorization.

561765756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714 (or 4712 counting only the distinct ones).

The product of its digits is 1323000, while the sum is 48.

The square root of 561765756 is about 23701.5981739629. The cubic root of 561765756 is about 825.1224824577.

The spelling of 561765756 in words is "five hundred sixty-one million, seven hundred sixty-five thousand, seven hundred fifty-six".