561646225377238 has 16 divisors (see below), whose sum is σ = 845880833456064. Its totient is φ = 279687969187200.

The previous prime is 561646225377197. The next prime is 561646225377247. The reversal of 561646225377238 is 832773522646165.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504850963 + ... + 505962238.

It is an arithmetic number, because the mean of its divisors is an integer number (52867552091004).

Almost surely, 2^{561646225377238} is an apocalyptic number.

561646225377238 is a deficient number, since it is larger than the sum of its proper divisors (284234608078826).

561646225377238 is a wasteful number, since it uses less digits than its factorization.

561646225377238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010814327.

The product of its digits is 609638400, while the sum is 67.

The spelling of 561646225377238 in words is "five hundred sixty-one trillion, six hundred forty-six billion, two hundred twenty-five million, three hundred seventy-seven thousand, two hundred thirty-eight".