561481011 has 32 divisors (see below), whose sum is σ = 1023787520. Its totient is φ = 296164512.

The previous prime is 561480961. The next prime is 561481013. The reversal of 561481011 is 110184165.

561481011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561481011 - 2²⁶ = 494372147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (561481013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111805 + ... + 116718.

It is an arithmetic number, because the mean of its divisors is an integer number (31993360).

Almost surely, 2^561481011 is an apocalyptic number.

561481011 is a deficient number, since it is larger than the sum of its proper divisors (462306509).

561481011 is a wasteful number, since it uses less digits than its factorization.

561481011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228552 (or 228546 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 561481011 is about 23695.5905391699. The cubic root of 561481011 is about 824.9830475855.

The spelling of 561481011 in words is "five hundred sixty-one million, four hundred eighty-one thousand, eleven".