561051877 has 4 divisors (see below), whose sum is σ = 561101580. Its totient is φ = 561002176.

The previous prime is 561051871. The next prime is 561051889. The reversal of 561051877 is 778150165.

561051877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26563716 + 534488161 = 5154^2 + 23119^2 .

It is a cyclic number.

It is not a de Polignac number, because 561051877 - 2¹¹ = 561049829 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561051871) 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, 1149 + ... + 33517.

It is an arithmetic number, because the mean of its divisors is an integer number (140275395).

Almost surely, 2^561051877 is an apocalyptic number.

It is an amenable number.

561051877 is a deficient number, since it is larger than the sum of its proper divisors (49703).

561051877 is a wasteful number, since it uses less digits than its factorization.

561051877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49702.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 561051877 is about 23686.5336636664. The cubic root of 561051877 is about 824.7728187444.

The spelling of 561051877 in words is "five hundred sixty-one million, fifty-one thousand, eight hundred seventy-seven".