8561013444 has 72 divisors (see below), whose sum is σ = 23165845248. Its totient is φ = 2761607520.

The previous prime is 8561013431. The next prime is 8561013467. The reversal of 8561013444 is 4443101658.

8561013444 is a `hidden beast` number, since 8 + 5 + 610 + 1 + 34 + 4 + 4 = 666.

It is a super-2 number, since 2×8561013444² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8561013399 and 8561013408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111927 + ... + 172190.

Almost surely, 2^8561013444 is an apocalyptic number.

It is an amenable number.

8561013444 is an abundant number, since it is smaller than the sum of its proper divisors (14604831804).

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

8561013444 is a wasteful number, since it uses less digits than its factorization.

8561013444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284167 (or 284153 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 8561013444 is about 92525.7447632820. The cubic root of 8561013444 is about 2045.6989693075.

The spelling of 8561013444 in words is "eight billion, five hundred sixty-one million, thirteen thousand, four hundred forty-four".