561605499 has 96 divisors (see below), whose sum is σ = 1051674624. Its totient is φ = 280869120.

The previous prime is 561605497. The next prime is 561605507. The reversal of 561605499 is 994506165.

It is a happy number.

It is not a de Polignac number, because 561605499 - 2¹ = 561605497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561605497) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1302814 + ... + 1303244.

It is an arithmetic number, because the mean of its divisors is an integer number (10954944).

Almost surely, 2^561605499 is an apocalyptic number.

561605499 is a deficient number, since it is larger than the sum of its proper divisors (490069125).

561605499 is a wasteful number, since it uses less digits than its factorization.

561605499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 561605499 is about 23698.2172114275. The cubic root of 561605499 is about 825.0440130789.

The spelling of 561605499 in words is "five hundred sixty-one million, six hundred five thousand, four hundred ninety-nine".