7888523681 has 2 divisors, whose sum is σ = 7888523682. Its totient is φ = 7888523680.

The previous prime is 7888523623. The next prime is 7888523689. The reversal of 7888523681 is 1863258887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6780699025 + 1107824656 = 82345^2 + 33284^2 .

It is a cyclic number.

It is not a de Polignac number, because 7888523681 - 2²⁶ = 7821414817 is a prime.

It is a super-2 number, since 2×7888523681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7888523689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3944261840 + 3944261841.

It is an arithmetic number, because the mean of its divisors is an integer number (3944261841).

Almost surely, 2^7888523681 is an apocalyptic number.

It is an amenable number.

7888523681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7888523681 is an equidigital number, since it uses as much as digits as its factorization.

7888523681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5160960, while the sum is 56.

The square root of 7888523681 is about 88817.3613715247. The cubic root of 7888523681 is about 1990.6668203788. Note that the first 3 decimals are identical.

The spelling of 7888523681 in words is "seven billion, eight hundred eighty-eight million, five hundred twenty-three thousand, six hundred eighty-one".