561601549 has 8 divisors (see below), whose sum is σ = 580626432. Its totient is φ = 542633520.

The previous prime is 561601519. The next prime is 561601583. The reversal of 561601549 is 945106165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561601549 - 2⁵ = 561601517 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 (561601519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6372 + ... + 34114.

It is an arithmetic number, because the mean of its divisors is an integer number (72578304).

Almost surely, 2^561601549 is an apocalyptic number.

It is an amenable number.

561601549 is a deficient number, since it is larger than the sum of its proper divisors (19024883).

561601549 is a wasteful number, since it uses less digits than its factorization.

561601549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28427.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 561601549 is about 23698.1338716786. The cubic root of 561601549 is about 825.0420787843.

The spelling of 561601549 in words is "five hundred sixty-one million, six hundred one thousand, five hundred forty-nine".