991671034175 has 36 divisors (see below), whose sum is σ = 1299862156176. Its totient is φ = 750386851200.

The previous prime is 991671034157. The next prime is 991671034177. The reversal of 991671034175 is 571430176199.

It is not a de Polignac number, because 991671034175 - 2⁸ = 991671033919 is a prime.

It is a super-2 number, since 2×991671034175² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991671034177) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5607707 + ... + 5781843.

It is an arithmetic number, because the mean of its divisors is an integer number (36107282116).

Almost surely, 2^991671034175 is an apocalyptic number.

991671034175 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

991671034175 is a deficient number, since it is larger than the sum of its proper divisors (308191122001).

991671034175 is a wasteful number, since it uses less digits than its factorization.

991671034175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174816 (or 174792 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 53.

The spelling of 991671034175 in words is "nine hundred ninety-one billion, six hundred seventy-one million, thirty-four thousand, one hundred seventy-five".