91850008511 has 2 divisors, whose sum is σ = 91850008512. Its totient is φ = 91850008510.

The previous prime is 91850008489. The next prime is 91850008519. The reversal of 91850008511 is 11580005819.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91850008511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91850008519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45925004255 + 45925004256.

It is an arithmetic number, because the mean of its divisors is an integer number (45925004256).

Almost surely, 2^91850008511 is an apocalyptic number.

91850008511 is a deficient number, since it is larger than the sum of its proper divisors (1).

91850008511 is an equidigital number, since it uses as much as digits as its factorization.

91850008511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 38.

The spelling of 91850008511 in words is "ninety-one billion, eight hundred fifty million, eight thousand, five hundred eleven".