129732769856 has 14 divisors (see below), whose sum is σ = 257438465310. Its totient is φ = 64866384896.

The previous prime is 129732769847. The next prime is 129732769877. The reversal of 129732769856 is 658967237921.

129732769856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 84090720256 + 45642049600 = 289984^2 + 213640^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129732769792 and 129732769801.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1013537201 + ... + 1013537328.

Almost surely, 2^129732769856 is an apocalyptic number.

129732769856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129732769856 is a deficient number, since it is larger than the sum of its proper divisors (127705695454).

129732769856 is an equidigital number, since it uses as much as digits as its factorization.

129732769856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027074541 (or 2027074531 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 65.

The spelling of 129732769856 in words is "one hundred twenty-nine billion, seven hundred thirty-two million, seven hundred sixty-nine thousand, eight hundred fifty-six".