91288819018811 has 2 divisors, whose sum is σ = 91288819018812. Its totient is φ = 91288819018810.

The previous prime is 91288819018799. The next prime is 91288819018853. The reversal of 91288819018811 is 11881091888219.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91288819018811 is a prime.

It is not a weakly prime, because it can be changed into another prime (91288819018861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45644409509405 + 45644409509406.

It is an arithmetic number, because the mean of its divisors is an integer number (45644409509406).

Almost surely, 2^{91288819018811} is an apocalyptic number.

91288819018811 is a deficient number, since it is larger than the sum of its proper divisors (1).

91288819018811 is an equidigital number, since it uses as much as digits as its factorization.

91288819018811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5308416, while the sum is 65.

The spelling of 91288819018811 in words is "ninety-one trillion, two hundred eighty-eight billion, eight hundred nineteen million, eighteen thousand, eight hundred eleven".