129049571549 has 8 divisors (see below), whose sum is σ = 129141470880. Its totient is φ = 128957710000.

The previous prime is 129049571513. The next prime is 129049571579. The reversal of 129049571549 is 945175940921.

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 129049571549 - 2²⁰ = 129048522973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129049571494 and 129049571503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129049571579) 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, 10527674 + ... + 10539924.

It is an arithmetic number, because the mean of its divisors is an integer number (16142683860).

Almost surely, 2^129049571549 is an apocalyptic number.

It is an amenable number.

129049571549 is a deficient number, since it is larger than the sum of its proper divisors (91899331).

129049571549 is a wasteful number, since it uses less digits than its factorization.

129049571549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18891.

The product of its (nonzero) digits is 4082400, while the sum is 56.

The spelling of 129049571549 in words is "one hundred twenty-nine billion, forty-nine million, five hundred seventy-one thousand, five hundred forty-nine".