561520769 has 8 divisors (see below), whose sum is σ = 585307008. Its totient is φ = 538187760.

The previous prime is 561520741. The next prime is 561520777. The reversal of 561520769 is 967025165.

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 561520769 - 2¹² = 561516673 is a prime.

It is a super-2 number, since 2×561520769² = 630611148036702722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561520369) 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, 110777 + ... + 115734.

It is an arithmetic number, because the mean of its divisors is an integer number (73163376).

Almost surely, 2^561520769 is an apocalyptic number.

It is an amenable number.

561520769 is a deficient number, since it is larger than the sum of its proper divisors (23786239).

561520769 is a wasteful number, since it uses less digits than its factorization.

561520769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226615.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 561520769 is about 23696.4294567768. The cubic root of 561520769 is about 825.0025192454.

The spelling of 561520769 in words is "five hundred sixty-one million, five hundred twenty thousand, seven hundred sixty-nine".