561111728376 has 32 divisors (see below), whose sum is σ = 1440692277840. Its totient is φ = 181982181888.

The previous prime is 561111728279. The next prime is 561111728417. The reversal of 561111728376 is 673827111165.

It is a super-2 number, since 2×561111728376² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315940401 + ... + 315942176.

Almost surely, 2^561111728376 is an apocalyptic number.

It is an amenable number.

561111728376 is an abundant number, since it is smaller than the sum of its proper divisors (879580549464).

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

561111728376 is a wasteful number, since it uses less digits than its factorization.

561111728376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631882623 (or 631882619 counting only the distinct ones).

The product of its digits is 423360, while the sum is 48.

The spelling of 561111728376 in words is "five hundred sixty-one billion, one hundred eleven million, seven hundred twenty-eight thousand, three hundred seventy-six".