91400390449 has 8 divisors (see below), whose sum is σ = 92160934272. Its totient is φ = 90641889600.

The previous prime is 91400390447. The next prime is 91400390467. The reversal of 91400390449 is 94409300419.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91400390449 - 2¹ = 91400390447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91400390441) 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 in 7 ways as a sum of consecutive naturals, for example, 420829 + ... + 599914.

It is an arithmetic number, because the mean of its divisors is an integer number (11520116784).

Almost surely, 2^91400390449 is an apocalyptic number.

It is an amenable number.

91400390449 is a deficient number, since it is larger than the sum of its proper divisors (760543823).

91400390449 is a wasteful number, since it uses less digits than its factorization.

91400390449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021487.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 91400390449 in words is "ninety-one billion, four hundred million, three hundred ninety thousand, four hundred forty-nine".