129249818819 has 8 divisors (see below), whose sum is σ = 141589762560. Its totient is φ = 117008201800.

The previous prime is 129249818809. The next prime is 129249818869. The reversal of 129249818819 is 918818942921.

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 129249818819 - 2³⁶ = 60530342083 is a prime.

It is a super-2 number, since 2×129249818819² (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 (129249818809) 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, 24578927 + ... + 24584184.

It is an arithmetic number, because the mean of its divisors is an integer number (17698720320).

Almost surely, 2^129249818819 is an apocalyptic number.

129249818819 is a deficient number, since it is larger than the sum of its proper divisors (12339943741).

129249818819 is a wasteful number, since it uses less digits than its factorization.

129249818819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49163361.

The product of its digits is 5971968, while the sum is 62.

The spelling of 129249818819 in words is "one hundred twenty-nine billion, two hundred forty-nine million, eight hundred eighteen thousand, eight hundred nineteen".