91667509171 has 8 divisors (see below), whose sum is σ = 109317775104. Its totient is φ = 75155970120.

The previous prime is 91667509163. The next prime is 91667509183. The reversal of 91667509171 is 17190576619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91667509171 - 2³ = 91667509163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91667509471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284681545 + ... + 284681866.

It is an arithmetic number, because the mean of its divisors is an integer number (13664721888).

Almost surely, 2^91667509171 is an apocalyptic number.

91667509171 is a deficient number, since it is larger than the sum of its proper divisors (17650265933).

91667509171 is a wasteful number, since it uses less digits than its factorization.

91667509171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569363441.

The product of its (nonzero) digits is 714420, while the sum is 52.

The spelling of 91667509171 in words is "ninety-one billion, six hundred sixty-seven million, five hundred nine thousand, one hundred seventy-one".