129136955073 has 64 divisors (see below), whose sum is σ = 200465362944. Its totient is φ = 72427680000.

The previous prime is 129136955053. The next prime is 129136955081. The reversal of 129136955073 is 370559631921.

It is not a de Polignac number, because 129136955073 - 2¹² = 129136950977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129136955023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121711963 + ... + 121713023.

It is an arithmetic number, because the mean of its divisors is an integer number (3132271296).

Almost surely, 2^129136955073 is an apocalyptic number.

It is an amenable number.

129136955073 is a deficient number, since it is larger than the sum of its proper divisors (71328407871).

129136955073 is a wasteful number, since it uses less digits than its factorization.

129136955073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 1530900, while the sum is 51.

The spelling of 129136955073 in words is "one hundred twenty-nine billion, one hundred thirty-six million, nine hundred fifty-five thousand, seventy-three".