561265218646134 has 128 divisors (see below), whose sum is σ = 1204906696704000. Its totient is φ = 173786456188800.

The previous prime is 561265218646109. The next prime is 561265218646189. The reversal of 561265218646134 is 431646812562165.

It is a happy number.

It is a super-3 number, since 3×561265218646134³ (a number of 45 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 799515217 + ... + 800216915.

It is an arithmetic number, because the mean of its divisors is an integer number (9413333568000).

Almost surely, 2^{561265218646134} is an apocalyptic number.

561265218646134 is an abundant number, since it is smaller than the sum of its proper divisors (643641478057866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561265218646134 is a wasteful number, since it uses less digits than its factorization.

561265218646134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702498.

The product of its digits is 49766400, while the sum is 60.

The spelling of 561265218646134 in words is "five hundred sixty-one trillion, two hundred sixty-five billion, two hundred eighteen million, six hundred forty-six thousand, one hundred thirty-four".