129026538436609 has 8 divisors (see below), whose sum is σ = 141064224244128. Its totient is φ = 117040186044960.

The previous prime is 129026538436583. The next prime is 129026538436619. The reversal of 129026538436609 is 906634835620921.

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 129026538436609 - 2⁹ = 129026538436097 is a prime.

It is a super-2 number, since 2×129026538436609² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129026538436619) 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, 12833348707 + ... + 12833358760.

It is an arithmetic number, because the mean of its divisors is an integer number (17633028030516).

Almost surely, 2^{129026538436609} is an apocalyptic number.

It is an amenable number.

129026538436609 is a deficient number, since it is larger than the sum of its proper divisors (12037685807519).

129026538436609 is a wasteful number, since it uses less digits than its factorization.

129026538436609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25666707935.

The product of its (nonzero) digits is 100776960, while the sum is 64.

The spelling of 129026538436609 in words is "one hundred twenty-nine trillion, twenty-six billion, five hundred thirty-eight million, four hundred thirty-six thousand, six hundred nine".