561500587942 has 32 divisors (see below), whose sum is σ = 988825420800. Its totient is φ = 234082988640.

The previous prime is 561500587939. The next prime is 561500588027. The reversal of 561500587942 is 249785005165.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 561500587942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2063559 + ... + 2319757.

It is an arithmetic number, because the mean of its divisors is an integer number (30900794400).

Almost surely, 2^561500587942 is an apocalyptic number.

561500587942 is a deficient number, since it is larger than the sum of its proper divisors (427324832858).

561500587942 is a wasteful number, since it uses less digits than its factorization.

561500587942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260476.

The product of its (nonzero) digits is 3024000, while the sum is 52.

The spelling of 561500587942 in words is "five hundred sixty-one billion, five hundred million, five hundred eighty-seven thousand, nine hundred forty-two".