129734376865 has 8 divisors (see below), whose sum is σ = 155683630440. Its totient is φ = 103785916032.

The previous prime is 129734376859. The next prime is 129734376883. The reversal of 129734376865 is 568673437921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41909868961 + 87824507904 = 204719^2 + 296352^2 .

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 129734376865 - 2³ = 129734376857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256827 + ... + 570463.

It is an arithmetic number, because the mean of its divisors is an integer number (19460453805).

Almost surely, 2^129734376865 is an apocalyptic number.

It is an amenable number.

129734376865 is a deficient number, since it is larger than the sum of its proper divisors (25949253575).

129734376865 is an equidigital number, since it uses as much as digits as its factorization.

129734376865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396371.

The product of its digits is 45722880, while the sum is 61.

The spelling of 129734376865 in words is "one hundred twenty-nine billion, seven hundred thirty-four million, three hundred seventy-six thousand, eight hundred sixty-five".