7564718989 has 2 divisors, whose sum is σ = 7564718990. Its totient is φ = 7564718988.

The previous prime is 7564718947. The next prime is 7564719011. The reversal of 7564718989 is 9898174657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4232543364 + 3332175625 = 65058^2 + 57725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7564718989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7564718989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7564718789) 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, 3782359494 + 3782359495.

It is an arithmetic number, because the mean of its divisors is an integer number (3782359495).

Almost surely, 2^7564718989 is an apocalyptic number.

It is an amenable number.

7564718989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7564718989 is an equidigital number, since it uses as much as digits as its factorization.

7564718989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 64.

The square root of 7564718989 is about 86975.3930085976. The cubic root of 7564718989 is about 1963.0480642952.

The spelling of 7564718989 in words is "seven billion, five hundred sixty-four million, seven hundred eighteen thousand, nine hundred eighty-nine".