7656557849 has 2 divisors, whose sum is σ = 7656557850. Its totient is φ = 7656557848.

The previous prime is 7656557819. The next prime is 7656557879. The reversal of 7656557849 is 9487556567.

It is a balanced prime because it is at equal distance from previous prime (7656557819) and next prime (7656557879).

It can be written as a sum of positive squares in only one way, i.e., 7270631824 + 385926025 = 85268^2 + 19645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7656557849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7656557791 and 7656557800.

It is not a weakly prime, because it can be changed into another prime (7656557809) 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, 3828278924 + 3828278925.

It is an arithmetic number, because the mean of its divisors is an integer number (3828278925).

Almost surely, 2^7656557849 is an apocalyptic number.

It is an amenable number.

7656557849 is a deficient number, since it is larger than the sum of its proper divisors (1).

7656557849 is an equidigital number, since it uses as much as digits as its factorization.

7656557849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504000, while the sum is 62.

The square root of 7656557849 is about 87501.7591194600. The cubic root of 7656557849 is about 1970.9602067486.

The spelling of 7656557849 in words is "seven billion, six hundred fifty-six million, five hundred fifty-seven thousand, eight hundred forty-nine".