91949438088 has 80 divisors (see below), whose sum is σ = 268741154880. Its totient is φ = 29317207392.

The previous prime is 91949438059. The next prime is 91949438093. The reversal of 91949438088 is 88083494919.

91949438088 is a `hidden beast` number, since 9 + 1 + 94 + 94 + 380 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3069820 + ... + 3099627.

It is an arithmetic number, because the mean of its divisors is an integer number (3359264436).

Almost surely, 2^91949438088 is an apocalyptic number.

It is an amenable number.

91949438088 is an abundant number, since it is smaller than the sum of its proper divisors (176791716792).

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

91949438088 is a wasteful number, since it uses less digits than its factorization.

91949438088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169488 (or 6169475 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 63.

The spelling of 91949438088 in words is "ninety-one billion, nine hundred forty-nine million, four hundred thirty-eight thousand, eighty-eight".