8261060985 has 48 divisors (see below), whose sum is σ = 14648864256. Its totient is φ = 4304778624.

The previous prime is 8261060981. The next prime is 8261060993. The reversal of 8261060985 is 5890601628.

8261060985 is a `hidden beast` number, since 8 + 26 + 10 + 609 + 8 + 5 = 666.

It is not a de Polignac number, because 8261060985 - 2² = 8261060981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8261060985.

It is not an unprimeable number, because it can be changed into a prime (8261060981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1365387 + ... + 1371423.

It is an arithmetic number, because the mean of its divisors is an integer number (305184672).

Almost surely, 2^8261060985 is an apocalyptic number.

It is an amenable number.

8261060985 is a deficient number, since it is larger than the sum of its proper divisors (6387803271).

8261060985 is a wasteful number, since it uses less digits than its factorization.

8261060985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742 (or 6739 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 8261060985 is about 90890.3789462889. The cubic root of 8261060985 is about 2021.5226392659.

The spelling of 8261060985 in words is "eight billion, two hundred sixty-one million, sixty thousand, nine hundred eighty-five".