45450042091 has 2 divisors, whose sum is σ = 45450042092. Its totient is φ = 45450042090.

The previous prime is 45450042061. The next prime is 45450042109. The reversal of 45450042091 is 19024005454.

Together with next prime (45450042109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45450042091 - 2¹³ = 45450033899 is a prime.

It is not a weakly prime, because it can be changed into another prime (45450042061) 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, 22725021045 + 22725021046.

It is an arithmetic number, because the mean of its divisors is an integer number (22725021046).

Almost surely, 2^45450042091 is an apocalyptic number.

45450042091 is a deficient number, since it is larger than the sum of its proper divisors (1).

45450042091 is an equidigital number, since it uses as much as digits as its factorization.

45450042091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 45450042091 in words is "forty-five billion, four hundred fifty million, forty-two thousand, ninety-one".