7142785785 has 12 divisors (see below), whose sum is σ = 12380828772. Its totient is φ = 3809485728.

The previous prime is 7142785763. The next prime is 7142785801. The reversal of 7142785785 is 5875872417.

7142785785 is a `hidden beast` number, since 71 + 427 + 85 + 78 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1111088889 + 6031696896 = 33333^2 + 77664^2 .

It is not a de Polignac number, because 7142785785 - 2¹⁴ = 7142769401 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 79364242 + ... + 79364331.

It is an arithmetic number, because the mean of its divisors is an integer number (1031735731).

Almost surely, 2^7142785785 is an apocalyptic number.

It is an amenable number.

7142785785 is a deficient number, since it is larger than the sum of its proper divisors (5238042987).

7142785785 is a wasteful number, since it uses less digits than its factorization.

7142785785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158728584 (or 158728581 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 54.

The square root of 7142785785 is about 84515.0033130213. The cubic root of 7142785785 is about 1925.8503723655.

The spelling of 7142785785 in words is "seven billion, one hundred forty-two million, seven hundred eighty-five thousand, seven hundred eighty-five".