91819050451 has 2 divisors, whose sum is σ = 91819050452. Its totient is φ = 91819050450.

The previous prime is 91819050413. The next prime is 91819050503. The reversal of 91819050451 is 15405091819.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91819050451 - 2¹¹ = 91819048403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91819050398 and 91819050407.

It is not a weakly prime, because it can be changed into another prime (91819054451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45909525225 + 45909525226.

It is an arithmetic number, because the mean of its divisors is an integer number (45909525226).

Almost surely, 2^91819050451 is an apocalyptic number.

91819050451 is a deficient number, since it is larger than the sum of its proper divisors (1).

91819050451 is an equidigital number, since it uses as much as digits as its factorization.

91819050451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 43.

The spelling of 91819050451 in words is "ninety-one billion, eight hundred nineteen million, fifty thousand, four hundred fifty-one".