561715321238 has 16 divisors (see below), whose sum is σ = 853331573760. Its totient is φ = 277272239400.

The previous prime is 561715321207. The next prime is 561715321309. The reversal of 561715321238 is 832123517165.

It is a super-2 number, since 2×561715321238² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1294493 + ... + 1673063.

It is an arithmetic number, because the mean of its divisors is an integer number (53333223360).

Almost surely, 2^561715321238 is an apocalyptic number.

561715321238 is a deficient number, since it is larger than the sum of its proper divisors (291616252522).

561715321238 is a wasteful number, since it uses less digits than its factorization.

561715321238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388043.

The product of its digits is 302400, while the sum is 44.

The spelling of 561715321238 in words is "five hundred sixty-one billion, seven hundred fifteen million, three hundred twenty-one thousand, two hundred thirty-eight".