129440959067 has 4 divisors (see below), whose sum is σ = 147932524656. Its totient is φ = 110949393480.

The previous prime is 129440959051. The next prime is 129440959093. The reversal of 129440959067 is 760959044921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 760959044921 = 239857 ⋅3172553.

It is a cyclic number.

It is not a de Polignac number, because 129440959067 - 2⁴ = 129440959051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129440959667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9245782784 + ... + 9245782797.

It is an arithmetic number, because the mean of its divisors is an integer number (36983131164).

Almost surely, 2^129440959067 is an apocalyptic number.

129440959067 is a deficient number, since it is larger than the sum of its proper divisors (18491565589).

129440959067 is an equidigital number, since it uses as much as digits as its factorization.

129440959067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18491565588.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 129440959067 in words is "one hundred twenty-nine billion, four hundred forty million, nine hundred fifty-nine thousand, sixty-seven".