561356768 has 48 divisors (see below), whose sum is σ = 1317980160. Its totient is φ = 230119296.

The previous prime is 561356749. The next prime is 561356771. The reversal of 561356768 is 867653165.

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, 49328 + ... + 59631.

It is an arithmetic number, because the mean of its divisors is an integer number (27457920).

Almost surely, 2^561356768 is an apocalyptic number.

It is an amenable number.

561356768 is an abundant number, since it is smaller than the sum of its proper divisors (756623392).

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

561356768 is a wasteful number, since it uses less digits than its factorization.

561356768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108999 (or 108991 counting only the distinct ones).

The product of its digits is 907200, while the sum is 47.

The square root of 561356768 is about 23692.9687460225. The cubic root of 561356768 is about 824.9221930907.

The spelling of 561356768 in words is "five hundred sixty-one million, three hundred fifty-six thousand, seven hundred sixty-eight".