91219375206 has 80 divisors (see below), whose sum is σ = 206680874400. Its totient is φ = 30067863552.

The previous prime is 91219375187. The next prime is 91219375223. The reversal of 91219375206 is 60257391219.

It is a happy number.

91219375206 is a `hidden beast` number, since 91 + 2 + 1 + 9 + 37 + 520 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12827980 + ... + 12835088.

It is an arithmetic number, because the mean of its divisors is an integer number (2583510930).

Almost surely, 2^91219375206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91219375206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103340437200).

91219375206 is an abundant number, since it is smaller than the sum of its proper divisors (115461499194).

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

91219375206 is a wasteful number, since it uses less digits than its factorization.

91219375206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995 (or 7986 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 91219375206 in words is "ninety-one billion, two hundred nineteen million, three hundred seventy-five thousand, two hundred six".