129239339616 has 96 divisors (see below), whose sum is σ = 377017693920. Its totient is φ = 43071823872.

The previous prime is 129239339611. The next prime is 129239339627. The reversal of 129239339616 is 616933932921.

129239339616 is a `hidden beast` number, since 1 + 2 + 9 + 239 + 3 + 396 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129239339611) 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 15 ways as a sum of consecutive naturals, for example, 6377436 + ... + 6397668.

It is an arithmetic number, because the mean of its divisors is an integer number (3927267645).

Almost surely, 2^129239339616 is an apocalyptic number.

129239339616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129239339616 is an abundant number, since it is smaller than the sum of its proper divisors (247778354304).

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

129239339616 is a wasteful number, since it uses less digits than its factorization.

129239339616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27645 (or 27631 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 54.

It can be divided in two parts, 12923 and 9339616, that added together give a palindrome (9352539).

The spelling of 129239339616 in words is "one hundred twenty-nine billion, two hundred thirty-nine million, three hundred thirty-nine thousand, six hundred sixteen".