91981410406 has 8 divisors (see below), whose sum is σ = 139311651024. Its totient is φ = 45544193400.

The previous prime is 91981410403. The next prime is 91981410419. The reversal of 91981410406 is 60401418919.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91981410403) 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 in 3 ways as a sum of consecutive naturals, for example, 223255645 + ... + 223256056.

It is an arithmetic number, because the mean of its divisors is an integer number (17413956378).

Almost surely, 2^91981410406 is an apocalyptic number.

91981410406 is a deficient number, since it is larger than the sum of its proper divisors (47330240618).

91981410406 is a wasteful number, since it uses less digits than its factorization.

91981410406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446511806.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 91981410406 in words is "ninety-one billion, nine hundred eighty-one million, four hundred ten thousand, four hundred six".