8278688533 has 2 divisors, whose sum is σ = 8278688534. Its totient is φ = 8278688532.

The previous prime is 8278688527. The next prime is 8278688549. The reversal of 8278688533 is 3358868728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7641731889 + 636956644 = 87417^2 + 25238^2 .

It is a cyclic number.

It is not a de Polignac number, because 8278688533 - 2⁵ = 8278688501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8278688503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4139344266 + 4139344267.

It is an arithmetic number, because the mean of its divisors is an integer number (4139344267).

Almost surely, 2^8278688533 is an apocalyptic number.

It is an amenable number.

8278688533 is a deficient number, since it is larger than the sum of its proper divisors (1).

8278688533 is an equidigital number, since it uses as much as digits as its factorization.

8278688533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 58.

The square root of 8278688533 is about 90987.2987454843. The cubic root of 8278688533 is about 2022.9594672821.

The spelling of 8278688533 in words is "eight billion, two hundred seventy-eight million, six hundred eighty-eight thousand, five hundred thirty-three".