7820852845 has 16 divisors (see below), whose sum is σ = 10118494512. Its totient is φ = 5768801280.

The previous prime is 7820852807. The next prime is 7820852867. The reversal of 7820852845 is 5482580287.

It can be written as a sum of positive squares in 8 ways, for example, as 2973629961 + 4847222884 = 54531^2 + 69622^2 .

It is not a de Polignac number, because 7820852845 - 2¹⁷ = 7820721773 is a prime.

It is a super-2 number, since 2×7820852845² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 11022 + ... + 125551.

It is an arithmetic number, because the mean of its divisors is an integer number (632405907).

Almost surely, 2^7820852845 is an apocalyptic number.

It is an amenable number.

7820852845 is a deficient number, since it is larger than the sum of its proper divisors (2297641667).

7820852845 is a wasteful number, since it uses less digits than its factorization.

7820852845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137472.

The product of its (nonzero) digits is 1433600, while the sum is 49.

The square root of 7820852845 is about 88435.5858520765. The cubic root of 7820852845 is about 1984.9582265487.

The spelling of 7820852845 in words is "seven billion, eight hundred twenty million, eight hundred fifty-two thousand, eight hundred forty-five".