7657872769 has 2 divisors, whose sum is σ = 7657872770. Its totient is φ = 7657872768.

The previous prime is 7657872763. The next prime is 7657872779. The reversal of 7657872769 is 9672787567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5225410369 + 2432462400 = 72287^2 + 49320^2 .

It is a cyclic number.

It is not a de Polignac number, because 7657872769 - 2⁷ = 7657872641 is a prime.

It is a super-2 number, since 2×7657872769² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7657872769.

It is not a weakly prime, because it can be changed into another prime (7657872763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828936384 + 3828936385.

It is an arithmetic number, because the mean of its divisors is an integer number (3828936385).

Almost surely, 2^7657872769 is an apocalyptic number.

It is an amenable number.

7657872769 is a deficient number, since it is larger than the sum of its proper divisors (1).

7657872769 is an equidigital number, since it uses as much as digits as its factorization.

7657872769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62233920, while the sum is 64.

The square root of 7657872769 is about 87509.2724744070. The cubic root of 7657872769 is about 1971.0730297125.

The spelling of 7657872769 in words is "seven billion, six hundred fifty-seven million, eight hundred seventy-two thousand, seven hundred sixty-nine".