91141648049 has 2 divisors, whose sum is σ = 91141648050. Its totient is φ = 91141648048.

The previous prime is 91141648033. The next prime is 91141648051. The reversal of 91141648049 is 94084614119.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85062639025 + 6079009024 = 291655^2 + 77968^2 .

It is an emirp because it is prime and its reverse (94084614119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91141648049 - 2⁴ = 91141648033 is a prime.

Together with 91141648051, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91141647994 and 91141648012.

It is not a weakly prime, because it can be changed into another prime (91141648009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45570824024 + 45570824025.

It is an arithmetic number, because the mean of its divisors is an integer number (45570824025).

Almost surely, 2^91141648049 is an apocalyptic number.

It is an amenable number.

91141648049 is a deficient number, since it is larger than the sum of its proper divisors (1).

91141648049 is an equidigital number, since it uses as much as digits as its factorization.

91141648049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 91141648049 in words is "ninety-one billion, one hundred forty-one million, six hundred forty-eight thousand, forty-nine".