561661170 has 32 divisors (see below), whose sum is σ = 1540556928. Its totient is φ = 128379648.

The previous prime is 561661159. The next prime is 561661207. The reversal of 561661170 is 71166165.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1337079 + ... + 1337498.

It is an arithmetic number, because the mean of its divisors is an integer number (48142404).

Almost surely, 2^561661170 is an apocalyptic number.

561661170 is an abundant number, since it is smaller than the sum of its proper divisors (978895758).

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

561661170 is a wasteful number, since it uses less digits than its factorization.

561661170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674594.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 561661170 is about 23699.3917643470. The cubic root of 561661170 is about 825.0712739157.

The spelling of 561661170 in words is "five hundred sixty-one million, six hundred sixty-one thousand, one hundred seventy".