561077768 has 16 divisors (see below), whose sum is σ = 1080454380. Its totient is φ = 272956608.

The previous prime is 561077767. The next prime is 561077789. The reversal of 561077768 is 867770165.

It can be written as a sum of positive squares in 2 ways, for example, as 409738564 + 151339204 = 20242^2 + 12302^2 .

It is not an unprimeable number, because it can be changed into a prime (561077767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947471 + ... + 948062.

Almost surely, 2^561077768 is an apocalyptic number.

It is an amenable number.

561077768 is a deficient number, since it is larger than the sum of its proper divisors (519376612).

561077768 is a wasteful number, since it uses less digits than its factorization.

561077768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895576 (or 1895572 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 561077768 is about 23687.0801915306. The cubic root of 561077768 is about 824.7855055478.

The spelling of 561077768 in words is "five hundred sixty-one million, seventy-seven thousand, seven hundred sixty-eight".