129789508612 has 12 divisors (see below), whose sum is σ = 228789536220. Its totient is φ = 64421069696.

The previous prime is 129789508579. The next prime is 129789508619. The reversal of 129789508612 is 216805987921.

It can be written as a sum of positive squares in 2 ways, for example, as 24303562816 + 105485945796 = 155896^2 + 324786^2 .

It is not an unprimeable number, because it can be changed into a prime (129789508619) 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, 118420537 + ... + 118421632.

It is an arithmetic number, because the mean of its divisors is an integer number (19065794685).

Almost surely, 2^129789508612 is an apocalyptic number.

It is an amenable number.

129789508612 is a deficient number, since it is larger than the sum of its proper divisors (99000027608).

129789508612 is a wasteful number, since it uses less digits than its factorization.

129789508612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236842310 (or 236842308 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 58.

It can be divided in two parts, 129789 and 508612, that added together give a square (638401 = 799²).

The spelling of 129789508612 in words is "one hundred twenty-nine billion, seven hundred eighty-nine million, five hundred eight thousand, six hundred twelve".