571661404 has 6 divisors (see below), whose sum is σ = 1000407464. Its totient is φ = 285830700.

The previous prime is 571661383. The next prime is 571661411. The reversal of 571661404 is 404166175.

It is a self number, because there is not a number n which added to its sum of digits gives 571661404.

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 as a sum of consecutive naturals, namely, 71457672 + ... + 71457679.

Almost surely, 2^571661404 is an apocalyptic number.

It is an amenable number.

571661404 is a deficient number, since it is larger than the sum of its proper divisors (428746060).

571661404 is a wasteful number, since it uses less digits than its factorization.

571661404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142915355 (or 142915353 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 571661404 is about 23909.4417333404. The cubic root of 571661404 is about 829.9392242720.

The spelling of 571661404 in words is "five hundred seventy-one million, six hundred sixty-one thousand, four hundred four".