91943196833218 has 16 divisors (see below), whose sum is σ = 141564122941824. Its totient is φ = 44765085996400.

The previous prime is 91943196833197. The next prime is 91943196833237. The reversal of 91943196833218 is 81233869134919.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2482517308 + ... + 2482554343.

It is an arithmetic number, because the mean of its divisors is an integer number (8847757683864).

Almost surely, 2^{91943196833218} is an apocalyptic number.

91943196833218 is a deficient number, since it is larger than the sum of its proper divisors (49620926108606).

91943196833218 is a wasteful number, since it uses less digits than its factorization.

91943196833218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965071897.

The product of its digits is 60466176, while the sum is 67.

The spelling of 91943196833218 in words is "ninety-one trillion, nine hundred forty-three billion, one hundred ninety-six million, eight hundred thirty-three thousand, two hundred eighteen".