561512022272 has 72 divisors (see below), whose sum is σ = 1143862396992. Its totient is φ = 275037235200.

The previous prime is 561512022229. The next prime is 561512022317. The reversal of 561512022272 is 272220215165.

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, 2755247 + ... + 2952017.

It is an arithmetic number, because the mean of its divisors is an integer number (15886977736).

Almost surely, 2^561512022272 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 561512022272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (571931198496).

561512022272 is an abundant number, since it is smaller than the sum of its proper divisors (582350374720).

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

561512022272 is a wasteful number, since it uses less digits than its factorization.

561512022272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197015 (or 197001 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 561512022272 in words is "five hundred sixty-one billion, five hundred twelve million, twenty-two thousand, two hundred seventy-two".