561581870941 has 48 divisors (see below), whose sum is σ = 709463240640. Its totient is φ = 440580591360.

The previous prime is 561581870933. The next prime is 561581870957. The reversal of 561581870941 is 149078185165.

It is not a de Polignac number, because 561581870941 - 2³ = 561581870933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561581871941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159131665 + ... + 159135193.

It is an arithmetic number, because the mean of its divisors is an integer number (14780484180).

Almost surely, 2^561581870941 is an apocalyptic number.

It is an amenable number.

561581870941 is a deficient number, since it is larger than the sum of its proper divisors (147881369699).

561581870941 is a wasteful number, since it uses less digits than its factorization.

561581870941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594 (or 5587 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 55.

The spelling of 561581870941 in words is "five hundred sixty-one billion, five hundred eighty-one million, eight hundred seventy thousand, nine hundred forty-one".