129109493161 has 8 divisors (see below), whose sum is σ = 140857004448. Its totient is φ = 117363696000.

The previous prime is 129109493159. The next prime is 129109493243. The reversal of 129109493161 is 161394901921.

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

It is a cyclic number.

It is not a de Polignac number, because 129109493161 - 2¹ = 129109493159 is a prime.

It is a super-2 number, since 2×129109493161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129109493111) 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, 268435 + ... + 574696.

It is an arithmetic number, because the mean of its divisors is an integer number (17607125556).

Almost surely, 2^129109493161 is an apocalyptic number.

129109493161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129109493161 is a deficient number, since it is larger than the sum of its proper divisors (11747511287).

129109493161 is a wasteful number, since it uses less digits than its factorization.

129109493161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857063.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 129109493161 in words is "one hundred twenty-nine billion, one hundred nine million, four hundred ninety-three thousand, one hundred sixty-one".