8540512785 has 48 divisors (see below), whose sum is σ = 17913557376. Its totient is φ = 3674571264.

The previous prime is 8540512781. The next prime is 8540512793. The reversal of 8540512785 is 5872150458.

8540512785 is a `hidden beast` number, since 8 + 54 + 0 + 512 + 7 + 85 = 666.

It is not a de Polignac number, because 8540512785 - 2² = 8540512781 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8540512785.

It is not an unprimeable number, because it can be changed into a prime (8540512781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 792079 + ... + 802788.

It is an arithmetic number, because the mean of its divisors is an integer number (373199112).

Almost surely, 2^8540512785 is an apocalyptic number.

8540512785 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8540512785 is an abundant number, since it is smaller than the sum of its proper divisors (9373044591).

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

8540512785 is a wasteful number, since it uses less digits than its factorization.

8540512785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594902 (or 1594899 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 45.

The square root of 8540512785 is about 92414.8948222093. The cubic root of 8540512785 is about 2044.0647508954.

The spelling of 8540512785 in words is "eight billion, five hundred forty million, five hundred twelve thousand, seven hundred eighty-five".