561271604 has 12 divisors (see below), whose sum is σ = 1005068064. Its totient is φ = 274109304.

The previous prime is 561271583. The next prime is 561271631. The reversal of 561271604 is 406172165.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631432 + ... + 1631775.

It is an arithmetic number, because the mean of its divisors is an integer number (83755672).

Almost surely, 2^561271604 is an apocalyptic number.

It is an amenable number.

561271604 is a deficient number, since it is larger than the sum of its proper divisors (443796460).

561271604 is a wasteful number, since it uses less digits than its factorization.

561271604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263254 (or 3263252 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 561271604 is about 23691.1714357902. The cubic root of 561271604 is about 824.8804743890.

The spelling of 561271604 in words is "five hundred sixty-one million, two hundred seventy-one thousand, six hundred four".