129804581017 has 4 divisors (see below), whose sum is σ = 129879919120. Its totient is φ = 129729242916.

The previous prime is 129804581009. The next prime is 129804581021. The reversal of 129804581017 is 710185408921.

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 129804581017 - 2³ = 129804581009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129804581057) 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, 37666467 + ... + 37669912.

It is an arithmetic number, because the mean of its divisors is an integer number (32469979780).

Almost surely, 2^129804581017 is an apocalyptic number.

It is an amenable number.

129804581017 is a deficient number, since it is larger than the sum of its proper divisors (75338103).

129804581017 is an equidigital number, since it uses as much as digits as its factorization.

129804581017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75338102.

The product of its (nonzero) digits is 161280, while the sum is 46.

Adding to 129804581017 its reverse (710185408921), we get a palindrome (839989989938).

The spelling of 129804581017 in words is "one hundred twenty-nine billion, eight hundred four million, five hundred eighty-one thousand, seventeen".