129151644 has 12 divisors (see below), whose sum is σ = 301353864. Its totient is φ = 43050544.

The previous prime is 129151639. The next prime is 129151657. The reversal of 129151644 is 446151921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5381307 + ... + 5381330.

It is an arithmetic number, because the mean of its divisors is an integer number (25112822).

Almost surely, 2^129151644 is an apocalyptic number.

It is an amenable number.

129151644 is an abundant number, since it is smaller than the sum of its proper divisors (172202220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129151644 is a wasteful number, since it uses less digits than its factorization.

129151644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10762644 (or 10762642 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 129151644 is about 11364.4904857191. The cubic root of 129151644 is about 505.4753476068.

It can be divided in two parts, 129151 and 644, that added together give a triangular number (129795 = T₅₀₉).

The spelling of 129151644 in words is "one hundred twenty-nine million, one hundred fifty-one thousand, six hundred forty-four".