561236578 has 16 divisors (see below), whose sum is σ = 962438400. Its totient is φ = 240450336.

The previous prime is 561236567. The next prime is 561236591. The reversal of 561236578 is 875632165.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60775 + ... + 69397.

It is an arithmetic number, because the mean of its divisors is an integer number (60152400).

Almost surely, 2^561236578 is an apocalyptic number.

561236578 is a deficient number, since it is larger than the sum of its proper divisors (401201822).

561236578 is a wasteful number, since it uses less digits than its factorization.

561236578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13281.

The product of its digits is 302400, while the sum is 43.

The square root of 561236578 is about 23690.4322037400. The cubic root of 561236578 is about 824.8633152190.

The spelling of 561236578 in words is "five hundred sixty-one million, two hundred thirty-six thousand, five hundred seventy-eight".