561054811 has 2 divisors, whose sum is σ = 561054812. Its totient is φ = 561054810.

The previous prime is 561054799. The next prime is 561054877. The reversal of 561054811 is 118450165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561054811 - 2²⁷ = 426837083 is a prime.

It is not a weakly prime, because it can be changed into another prime (561054911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280527405 + 280527406.

It is an arithmetic number, because the mean of its divisors is an integer number (280527406).

Almost surely, 2^561054811 is an apocalyptic number.

561054811 is a deficient number, since it is larger than the sum of its proper divisors (1).

561054811 is an equidigital number, since it uses as much as digits as its factorization.

561054811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 561054811 is about 23686.5955975104. The cubic root of 561054811 is about 824.7742564482.

The spelling of 561054811 in words is "five hundred sixty-one million, fifty-four thousand, eight hundred eleven".