129157291505 has 8 divisors (see below), whose sum is σ = 169078636224. Its totient is φ = 93932575600.

The previous prime is 129157291489. The next prime is 129157291507. The reversal of 129157291505 is 505192751921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129157291505 - 2⁴ = 129157291489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129157291505.

It is not an unprimeable number, because it can be changed into a prime (129157291507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174157141 + ... + 1174157250.

It is an arithmetic number, because the mean of its divisors is an integer number (21134829528).

Almost surely, 2^129157291505 is an apocalyptic number.

It is an amenable number.

129157291505 is a deficient number, since it is larger than the sum of its proper divisors (39921344719).

129157291505 is a wasteful number, since it uses less digits than its factorization.

129157291505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348314407.

The product of its (nonzero) digits is 283500, while the sum is 47.

The spelling of 129157291505 in words is "one hundred twenty-nine billion, one hundred fifty-seven million, two hundred ninety-one thousand, five hundred five".