129515752052 has 12 divisors (see below), whose sum is σ = 226655767716. Its totient is φ = 64756961280.

The previous prime is 129515752039. The next prime is 129515752057. The reversal of 129515752052 is 250257515921.

It can be written as a sum of positive squares in 2 ways, for example, as 61621111696 + 67894640356 = 248236^2 + 260566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129515751994 and 129515752012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129515752057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165302 + ... + 535122.

It is an arithmetic number, because the mean of its divisors is an integer number (18887980643).

Almost surely, 2^129515752052 is an apocalyptic number.

It is an amenable number.

129515752052 is a deficient number, since it is larger than the sum of its proper divisors (97140015664).

129515752052 is a wasteful number, since it uses less digits than its factorization.

129515752052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457378 (or 457376 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 44.

The spelling of 129515752052 in words is "one hundred twenty-nine billion, five hundred fifteen million, seven hundred fifty-two thousand, fifty-two".