7849128563 has 2 divisors, whose sum is σ = 7849128564. Its totient is φ = 7849128562.

The previous prime is 7849128559. The next prime is 7849128587. The reversal of 7849128563 is 3658219487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7849128563 - 2² = 7849128559 is a prime.

It is not a weakly prime, because it can be changed into another prime (7849128523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3924564281 + 3924564282.

It is an arithmetic number, because the mean of its divisors is an integer number (3924564282).

Almost surely, 2^7849128563 is an apocalyptic number.

7849128563 is a deficient number, since it is larger than the sum of its proper divisors (1).

7849128563 is an equidigital number, since it uses as much as digits as its factorization.

7849128563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The square root of 7849128563 is about 88595.3077933589. The cubic root of 7849128563 is about 1987.3475062410.

The spelling of 7849128563 in words is "seven billion, eight hundred forty-nine million, one hundred twenty-eight thousand, five hundred sixty-three".