561985604 has 12 divisors (see below), whose sum is σ = 986680464. Its totient is φ = 280076904.

The previous prime is 561985601. The next prime is 561985607. The reversal of 561985604 is 406589165.

It is an interprime number because it is at equal distance from previous prime (561985601) and next prime (561985607).

It is not an unprimeable number, because it can be changed into a prime (561985601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227594 + ... + 230049.

It is an arithmetic number, because the mean of its divisors is an integer number (82223372).

Almost surely, 2^561985604 is an apocalyptic number.

It is an amenable number.

561985604 is a deficient number, since it is larger than the sum of its proper divisors (424694860).

561985604 is a wasteful number, since it uses less digits than its factorization.

561985604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457954 (or 457952 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 561985604 is about 23706.2355510106. The cubic root of 561985604 is about 825.2301061228.

The spelling of 561985604 in words is "five hundred sixty-one million, nine hundred eighty-five thousand, six hundred four".