8626769021 has 12 divisors (see below), whose sum is σ = 9396037812. Its totient is φ = 7873603584.

The previous prime is 8626769009. The next prime is 8626769033. The reversal of 8626769021 is 1209676268.

8626769021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8626769009) and next prime (8626769033).

It can be written as a sum of positive squares in 6 ways, for example, as 306775225 + 8319993796 = 17515^2 + 91214^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8626769021 is a prime.

It is a super-2 number, since 2×8626769021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8626769821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61085 + ... + 144861.

It is an arithmetic number, because the mean of its divisors is an integer number (783003151).

Almost surely, 2^8626769021 is an apocalyptic number.

It is an amenable number.

8626769021 is a deficient number, since it is larger than the sum of its proper divisors (769268791).

8626769021 is an equidigital number, since it uses as much as digits as its factorization.

8626769021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83968 (or 83879 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 8626769021 is about 92880.4017056343. The cubic root of 8626769021 is about 2050.9231631170.

The spelling of 8626769021 in words is "eight billion, six hundred twenty-six million, seven hundred sixty-nine thousand, twenty-one".