129645761052 has 72 divisors (see below), whose sum is σ = 319391513616. Its totient is φ = 40924694016.

The previous prime is 129645761039. The next prime is 129645761081. The reversal of 129645761052 is 250167546921.

It is a junction number, because it is equal to n+sod(n) for n = 129645760992 and 129645761010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16167348 + ... + 16175364.

Almost surely, 2^129645761052 is an apocalyptic number.

129645761052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129645761052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159695756808).

129645761052 is an abundant number, since it is smaller than the sum of its proper divisors (189745752564).

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

129645761052 is a wasteful number, since it uses less digits than its factorization.

129645761052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11795 (or 11774 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 129645761052 in words is "one hundred twenty-nine billion, six hundred forty-five million, seven hundred sixty-one thousand, fifty-two".