10997557171 has 4 divisors (see below), whose sum is σ = 11002237344. Its totient is φ = 10992877000.

The previous prime is 10997557169. The next prime is 10997557177. The reversal of 10997557171 is 17175579901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17175579901 = 19841 ⋅865661.

It is a cyclic number.

It is not a de Polignac number, because 10997557171 - 2¹ = 10997557169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10997557177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2336560 + ... + 2341261.

It is an arithmetic number, because the mean of its divisors is an integer number (2750559336).

Almost surely, 2^10997557171 is an apocalyptic number.

10997557171 is a deficient number, since it is larger than the sum of its proper divisors (4680173).

10997557171 is an equidigital number, since it uses as much as digits as its factorization.

10997557171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680172.

The product of its (nonzero) digits is 694575, while the sum is 52.

The spelling of 10997557171 in words is "ten billion, nine hundred ninety-seven million, five hundred fifty-seven thousand, one hundred seventy-one".