7845857479 has 2 divisors, whose sum is σ = 7845857480. Its totient is φ = 7845857478.

The previous prime is 7845857477. The next prime is 7845857501. The reversal of 7845857479 is 9747585487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7845857479 - 2¹ = 7845857477 is a prime.

Together with 7845857477, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7845857479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7845857477) 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 as a sum of consecutive naturals, namely, 3922928739 + 3922928740.

It is an arithmetic number, because the mean of its divisors is an integer number (3922928740).

Almost surely, 2^7845857479 is an apocalyptic number.

7845857479 is a deficient number, since it is larger than the sum of its proper divisors (1).

7845857479 is an equidigital number, since it uses as much as digits as its factorization.

7845857479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79027200, while the sum is 64.

The square root of 7845857479 is about 88576.8450499339. The cubic root of 7845857479 is about 1987.0713955941.

The spelling of 7845857479 in words is "seven billion, eight hundred forty-five million, eight hundred fifty-seven thousand, four hundred seventy-nine".