129393481915 has 4 divisors (see below), whose sum is σ = 155272178304. Its totient is φ = 103514785528.

The previous prime is 129393481873. The next prime is 129393481939. The reversal of 129393481915 is 519184393921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 519184393921 = 269 ⋅1930053509.

It is a cyclic number.

It is not a de Polignac number, because 129393481915 - 2¹³ = 129393473723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12939348187 + ... + 12939348196.

It is an arithmetic number, because the mean of its divisors is an integer number (38818044576).

Almost surely, 2^129393481915 is an apocalyptic number.

129393481915 is a deficient number, since it is larger than the sum of its proper divisors (25878696389).

129393481915 is an equidigital number, since it uses as much as digits as its factorization.

129393481915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25878696388.

The product of its digits is 2099520, while the sum is 55.

The spelling of 129393481915 in words is "one hundred twenty-nine billion, three hundred ninety-three million, four hundred eighty-one thousand, nine hundred fifteen".