561018983 has 6 divisors (see below), whose sum is σ = 652613976. Its totient is φ = 480873372.

The previous prime is 561018971. The next prime is 561019001. The reversal of 561018983 is 389810165.

It is not a de Polignac number, because 561018983 - 2¹² = 561014887 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 561018983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561018083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5724635 + ... + 5724732.

It is an arithmetic number, because the mean of its divisors is an integer number (108768996).

Almost surely, 2^561018983 is an apocalyptic number.

561018983 is a deficient number, since it is larger than the sum of its proper divisors (91594993).

561018983 is a wasteful number, since it uses less digits than its factorization.

561018983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11449381 (or 11449374 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 561018983 is about 23685.8392927082. The cubic root of 561018983 is about 824.7566998503.

The spelling of 561018983 in words is "five hundred sixty-one million, eighteen thousand, nine hundred eighty-three".