91090336148218 has 32 divisors (see below), whose sum is σ = 151552778263488. Its totient is φ = 40716840153600.

The previous prime is 91090336148183. The next prime is 91090336148221. The reversal of 91090336148218 is 81284163309019.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135605268 + ... + 136275343.

It is an arithmetic number, because the mean of its divisors is an integer number (4736024320734).

Almost surely, 2^{91090336148218} is an apocalyptic number.

91090336148218 is a deficient number, since it is larger than the sum of its proper divisors (60462442115270).

91090336148218 is a wasteful number, since it uses less digits than its factorization.

91090336148218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271880878.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 91090336148218 in words is "ninety-one trillion, ninety billion, three hundred thirty-six million, one hundred forty-eight thousand, two hundred eighteen".