7845523513 has 4 divisors (see below), whose sum is σ = 7855493200. Its totient is φ = 7835553828.

The previous prime is 7845523489. The next prime is 7845523577. The reversal of 7845523513 is 3153255487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7845523513 - 2²¹ = 7843426361 is a prime.

It is a super-2 number, since 2×7845523513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7845523513.

It is not an unprimeable number, because it can be changed into a prime (7845523313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4983663 + ... + 4985236.

It is an arithmetic number, because the mean of its divisors is an integer number (1963873300).

Almost surely, 2^7845523513 is an apocalyptic number.

It is an amenable number.

7845523513 is a deficient number, since it is larger than the sum of its proper divisors (9969687).

7845523513 is an equidigital number, since it uses as much as digits as its factorization.

7845523513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9969686.

The product of its digits is 504000, while the sum is 43.

The square root of 7845523513 is about 88574.9598532226. The cubic root of 7845523513 is about 1987.0432013654.

The spelling of 7845523513 in words is "seven billion, eight hundred forty-five million, five hundred twenty-three thousand, five hundred thirteen".