91454688645418 has 8 divisors (see below), whose sum is σ = 156779466249312. Its totient is φ = 39194866562316.

The previous prime is 91454688645407. The next prime is 91454688645421. The reversal of 91454688645418 is 81454688645419.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3266238880180 + ... + 3266238880207.

It is an arithmetic number, because the mean of its divisors is an integer number (19597433281164).

Almost surely, 2^{91454688645418} is an apocalyptic number.

91454688645418 is a deficient number, since it is larger than the sum of its proper divisors (65324777603894).

91454688645418 is a wasteful number, since it uses less digits than its factorization.

91454688645418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6532477760396.

The product of its digits is 1061683200, while the sum is 73.

Subtracting from 91454688645418 its reverse (81454688645419), we obtain a palindrome (9999999999999).

The spelling of 91454688645418 in words is "ninety-one trillion, four hundred fifty-four billion, six hundred eighty-eight million, six hundred forty-five thousand, four hundred eighteen".