561862197 has 32 divisors (see below), whose sum is σ = 925352960. Its totient is φ = 334601280.

The previous prime is 561862187. The next prime is 561862199. The reversal of 561862197 is 791268165.

561862197 is a `hidden beast` number, since 5 + 6 + 18 + 621 + 9 + 7 = 666.

It is not a de Polignac number, because 561862197 - 2⁴ = 561862181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561862199) 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, 14938 + ... + 36699.

It is an arithmetic number, because the mean of its divisors is an integer number (28917280).

Almost surely, 2^561862197 is an apocalyptic number.

It is an amenable number.

561862197 is a deficient number, since it is larger than the sum of its proper divisors (363490763).

561862197 is a wasteful number, since it uses less digits than its factorization.

561862197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51690 (or 51684 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 561862197 is about 23703.6325697139. The cubic root of 561862197 is about 825.1696973233.

The spelling of 561862197 in words is "five hundred sixty-one million, eight hundred sixty-two thousand, one hundred ninety-seven".