8561011992 has 64 divisors (see below), whose sum is σ = 23070996480. Its totient is φ = 2631629952.

The previous prime is 8561011981. The next prime is 8561012059. The reversal of 8561011992 is 2991101658.

It is a super-3 number, since 3×8561011992³ (a number of 31 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 15 ways as a sum of consecutive naturals, for example, 326523 + ... + 351765.

It is an arithmetic number, because the mean of its divisors is an integer number (360484320).

Almost surely, 2^8561011992 is an apocalyptic number.

It is an amenable number.

8561011992 is an abundant number, since it is smaller than the sum of its proper divisors (14509984488).

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

8561011992 is a wasteful number, since it uses less digits than its factorization.

8561011992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26352 (or 26348 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 42.

The square root of 8561011992 is about 92525.7369168168. The cubic root of 8561011992 is about 2045.6988536532.

The spelling of 8561011992 in words is "eight billion, five hundred sixty-one million, eleven thousand, nine hundred ninety-two".