561642631152 has 80 divisors (see below), whose sum is σ = 1487981905920. Its totient is φ = 182464097536.

The previous prime is 561642631141. The next prime is 561642631183. The reversal of 561642631152 is 251136246165.

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, 18358 + ... + 1060010.

It is an arithmetic number, because the mean of its divisors is an integer number (18599773824).

Almost surely, 2^561642631152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561642631152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743990952960).

561642631152 is an abundant number, since it is smaller than the sum of its proper divisors (926339274768).

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

561642631152 is a wasteful number, since it uses less digits than its factorization.

561642631152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041950 (or 1041944 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 561642631152 in words is "five hundred sixty-one billion, six hundred forty-two million, six hundred thirty-one thousand, one hundred fifty-two".