561600666015 has 32 divisors (see below), whose sum is σ = 973543608576. Its totient is φ = 275345656320.

The previous prime is 561600666013. The next prime is 561600666019. The reversal of 561600666015 is 510666006165.

It is not a de Polignac number, because 561600666015 - 2¹ = 561600666013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561600666013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25597821 + ... + 25619750.

It is an arithmetic number, because the mean of its divisors is an integer number (30423237768).

Almost surely, 2^561600666015 is an apocalyptic number.

561600666015 is a deficient number, since it is larger than the sum of its proper divisors (411942942561).

561600666015 is a wasteful number, since it uses less digits than its factorization.

561600666015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51217639.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 561600666015 in words is "five hundred sixty-one billion, six hundred million, six hundred sixty-six thousand, fifteen".