10901091991 has 2 divisors, whose sum is σ = 10901091992. Its totient is φ = 10901091990.

The previous prime is 10901091947. The next prime is 10901092003. The reversal of 10901091991 is 19919010901.

10901091991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10901091991 - 2²³ = 10892703383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10901091941) 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, 5450545995 + 5450545996.

It is an arithmetic number, because the mean of its divisors is an integer number (5450545996).

Almost surely, 2^10901091991 is an apocalyptic number.

10901091991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10901091991 is an equidigital number, since it uses as much as digits as its factorization.

10901091991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 10901091991 in words is "ten billion, nine hundred one million, ninety-one thousand, nine hundred ninety-one".