129653522642 has 18 divisors (see below), whose sum is σ = 226238387013. Its totient is φ = 55564267752.

The previous prime is 129653522641. The next prime is 129653522653. The reversal of 129653522642 is 246225356921.

129653522642 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 2 ways, for example, as 125571718321 + 4081804321 = 354361^2 + 63889^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=254611.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129653522641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3546368 + ... + 3582740.

Almost surely, 2^129653522642 is an apocalyptic number.

129653522642 is a deficient number, since it is larger than the sum of its proper divisors (96584864371).

129653522642 is an frugal number, since it uses more digits than its factorization.

129653522642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72762 (or 36382 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 47.

The spelling of 129653522642 in words is "one hundred twenty-nine billion, six hundred fifty-three million, five hundred twenty-two thousand, six hundred forty-two".