129726005050 has 24 divisors (see below), whose sum is σ = 241764464700. Its totient is φ = 51788446080.

The previous prime is 129726005033. The next prime is 129726005117. The reversal of 129726005050 is 50500627921.

It can be written as a sum of positive squares in 6 ways, for example, as 75975755769 + 53750249281 = 275637^2 + 231841^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2523195 + ... + 2574094.

Almost surely, 2^129726005050 is an apocalyptic number.

129726005050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129726005050 is a deficient number, since it is larger than the sum of its proper divisors (112038459650).

129726005050 is a wasteful number, since it uses less digits than its factorization.

129726005050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097810 (or 5097805 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 129726005050 in words is "one hundred twenty-nine billion, seven hundred twenty-six million, five thousand, fifty".