561330761 has 8 divisors (see below), whose sum is σ = 565422144. Its totient is φ = 557247600.

The previous prime is 561330727. The next prime is 561330767. The reversal of 561330761 is 167033165.

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 561330761 - 2⁶ = 561330697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561330767) 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, 210740 + ... + 213386.

It is an arithmetic number, because the mean of its divisors is an integer number (70677768).

Almost surely, 2^561330761 is an apocalyptic number.

It is an amenable number.

561330761 is a deficient number, since it is larger than the sum of its proper divisors (4091383).

561330761 is a wasteful number, since it uses less digits than its factorization.

561330761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 561330761 is about 23692.4199059530. The cubic root of 561330761 is about 824.9094536684.

The spelling of 561330761 in words is "five hundred sixty-one million, three hundred thirty thousand, seven hundred sixty-one".