561617001 has 24 divisors (see below), whose sum is σ = 888682080. Its totient is φ = 338947200.

The previous prime is 561616963. The next prime is 561617027. The reversal of 561617001 is 100716165.

It is not a de Polignac number, because 561617001 - 2¹¹ = 561614953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561617041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12090 + ... + 35628.

It is an arithmetic number, because the mean of its divisors is an integer number (37028420).

Almost surely, 2^561617001 is an apocalyptic number.

It is an amenable number.

561617001 is a deficient number, since it is larger than the sum of its proper divisors (327065079).

561617001 is a wasteful number, since it uses less digits than its factorization.

561617001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23797 (or 23794 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 561617001 is about 23698.4598866677. The cubic root of 561617001 is about 825.0496454973.

The spelling of 561617001 in words is "five hundred sixty-one million, six hundred seventeen thousand, one".