109318171949 has 6 divisors (see below), whose sum is σ = 127166036814. Its totient is φ = 93701290200.

The previous prime is 109318171927. The next prime is 109318171987. The reversal of 109318171949 is 949171813901.

It can be written as a sum of positive squares in only one way, i.e., 71693811049 + 37624360900 = 267757^2 + 193970^2 .

It is not a de Polignac number, because 109318171949 - 2²⁰ = 109317123373 is a prime.

It is a super-2 number, since 2×109318171949² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109318171949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109318171999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1115491502 + ... + 1115491599.

It is an arithmetic number, because the mean of its divisors is an integer number (21194339469).

Almost surely, 2^109318171949 is an apocalyptic number.

It is an amenable number.

109318171949 is a deficient number, since it is larger than the sum of its proper divisors (17847864865).

109318171949 is an equidigital number, since it uses as much as digits as its factorization.

109318171949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230983115 (or 2230983108 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 53.

The spelling of 109318171949 in words is "one hundred nine billion, three hundred eighteen million, one hundred seventy-one thousand, nine hundred forty-nine".