129044396755 has 8 divisors (see below), whose sum is σ = 154896540624. Its totient is φ = 103206674400.

The previous prime is 129044396749. The next prime is 129044396771. The reversal of 129044396755 is 557693440921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129044396755 - 2¹⁹ = 129043872467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129044396696 and 129044396705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3585681 + ... + 3621490.

It is an arithmetic number, because the mean of its divisors is an integer number (19362067578).

Almost surely, 2^129044396755 is an apocalyptic number.

129044396755 is a deficient number, since it is larger than the sum of its proper divisors (25852143869).

129044396755 is an equidigital number, since it uses as much as digits as its factorization.

129044396755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7210757.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 129044396755 in words is "one hundred twenty-nine billion, forty-four million, three hundred ninety-six thousand, seven hundred fifty-five".