85561992 has 24 divisors (see below), whose sum is σ = 231730590. Its totient is φ = 28520640.

The previous prime is 85561991. The next prime is 85561999. The reversal of 85561992 is 29916558.

85561992 is a `hidden beast` number, since 8 + 556 + 1 + 9 + 92 = 666.

It can be written as a sum of positive squares in only one way, i.e., 84382596 + 1179396 = 9186^2 + 1086^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (85561991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 594109 + ... + 594252.

Almost surely, 2^85561992 is an apocalyptic number.

It is an amenable number.

85561992 is an abundant number, since it is smaller than the sum of its proper divisors (146168598).

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

85561992 is a wasteful number, since it uses less digits than its factorization.

85561992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188373 (or 1188366 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 85561992 is about 9249.9725404998. The cubic root of 85561992 is about 440.6498524084.

The spelling of 85561992 in words is "eighty-five million, five hundred sixty-one thousand, nine hundred ninety-two".