129477513081 has 16 divisors (see below), whose sum is σ = 197309789568. Its totient is φ = 73983129600.

The previous prime is 129477513017. The next prime is 129477513119. The reversal of 129477513081 is 180315774921.

It is not a de Polignac number, because 129477513081 - 2⁶ = 129477513017 is a prime.

It is a super-2 number, since 2×129477513081² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129477513081.

It is not an unprimeable number, because it can be changed into a prime (129477513181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252601 + ... + 568121.

It is an arithmetic number, because the mean of its divisors is an integer number (12331861848).

Almost surely, 2^129477513081 is an apocalyptic number.

It is an amenable number.

129477513081 is a deficient number, since it is larger than the sum of its proper divisors (67832276487).

129477513081 is a wasteful number, since it uses less digits than its factorization.

129477513081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335072.

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 129477513081 in words is "one hundred twenty-nine billion, four hundred seventy-seven million, five hundred thirteen thousand, eighty-one".