129940611841 has 4 divisors (see below), whose sum is σ = 130279882752. Its totient is φ = 129601340932.

The previous prime is 129940611793. The next prime is 129940611869. The reversal of 129940611841 is 148116049921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129940611841 - 2¹¹ = 129940609793 is a prime.

It is a super-2 number, since 2×129940611841² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129940611791 and 129940611800.

It is not an unprimeable number, because it can be changed into a prime (129940611041) 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, 169634881 + ... + 169635646.

It is an arithmetic number, because the mean of its divisors is an integer number (32569970688).

Almost surely, 2^129940611841 is an apocalyptic number.

It is an amenable number.

129940611841 is a deficient number, since it is larger than the sum of its proper divisors (339270911).

129940611841 is an equidigital number, since it uses as much as digits as its factorization.

129940611841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339270910.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 129940611841 in words is "one hundred twenty-nine billion, nine hundred forty million, six hundred eleven thousand, eight hundred forty-one".