129253819835 has 16 divisors (see below), whose sum is σ = 177662543616. Its totient is φ = 88431109728.

The previous prime is 129253819789. The next prime is 129253819873. The reversal of 129253819835 is 538918352921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129253819835 - 2¹² = 129253815739 is a prime.

It is a Duffinian number.

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 in 15 ways as a sum of consecutive naturals, for example, 4152629 + ... + 4183638.

It is an arithmetic number, because the mean of its divisors is an integer number (11103908976).

Almost surely, 2^129253819835 is an apocalyptic number.

129253819835 is a deficient number, since it is larger than the sum of its proper divisors (48408723781).

129253819835 is an equidigital number, since it uses as much as digits as its factorization.

129253819835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336722.

The product of its digits is 4665600, while the sum is 56.

The spelling of 129253819835 in words is "one hundred twenty-nine billion, two hundred fifty-three million, eight hundred nineteen thousand, eight hundred thirty-five".