91298164212 has 36 divisors (see below), whose sum is σ = 231798149856. Its totient is φ = 30298653840.

The previous prime is 91298164183. The next prime is 91298164259. The reversal of 91298164212 is 21246189219.

It is a happy number.

91298164212 is a `hidden beast` number, since 91 + 298 + 1 + 64 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5577864 + ... + 5594207.

It is an arithmetic number, because the mean of its divisors is an integer number (6438837496).

Almost surely, 2^91298164212 is an apocalyptic number.

It is an amenable number.

91298164212 is an abundant number, since it is smaller than the sum of its proper divisors (140499985644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91298164212 is a wasteful number, since it uses less digits than its factorization.

91298164212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172308 (or 11172303 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The spelling of 91298164212 in words is "ninety-one billion, two hundred ninety-eight million, one hundred sixty-four thousand, two hundred twelve".