8526490991 has 2 divisors, whose sum is σ = 8526490992. Its totient is φ = 8526490990.

The previous prime is 8526490979. The next prime is 8526490997. The reversal of 8526490991 is 1990946258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8526490991 - 2¹⁰ = 8526489967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8526490997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4263245495 + 4263245496.

It is an arithmetic number, because the mean of its divisors is an integer number (4263245496).

Almost surely, 2^8526490991 is an apocalyptic number.

8526490991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8526490991 is an equidigital number, since it uses as much as digits as its factorization.

8526490991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The square root of 8526490991 is about 92339.0003790381. Note that the first 3 decimals coincide. The cubic root of 8526490991 is about 2042.9454912232.

The spelling of 8526490991 in words is "eight billion, five hundred twenty-six million, four hundred ninety thousand, nine hundred ninety-one".