561167278396 has 24 divisors (see below), whose sum is σ = 986777554896. Its totient is φ = 279231859200.

The previous prime is 561167278361. The next prime is 561167278411. The reversal of 561167278396 is 693872761165.

It is a happy number.

It is a congruent number.

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, 2085996 + ... + 2339596.

It is an arithmetic number, because the mean of its divisors is an integer number (41115731454).

Almost surely, 2^561167278396 is an apocalyptic number.

It is an amenable number.

561167278396 is a deficient number, since it is larger than the sum of its proper divisors (425610276500).

561167278396 is a wasteful number, since it uses less digits than its factorization.

561167278396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256269 (or 256267 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 61.

The spelling of 561167278396 in words is "five hundred sixty-one billion, one hundred sixty-seven million, two hundred seventy-eight thousand, three hundred ninety-six".