129661553137 has 8 divisors (see below), whose sum is σ = 135422971200. Its totient is φ = 124018927344.

The previous prime is 129661553123. The next prime is 129661553141. The reversal of 129661553137 is 731355166921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129661553137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129661503137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29695837 + ... + 29700202.

It is an arithmetic number, because the mean of its divisors is an integer number (16927871400).

Almost surely, 2^129661553137 is an apocalyptic number.

It is an amenable number.

129661553137 is a deficient number, since it is larger than the sum of its proper divisors (5761418063).

129661553137 is an equidigital number, since it uses as much as digits as its factorization.

129661553137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59396135.

The product of its digits is 1020600, while the sum is 49.

The spelling of 129661553137 in words is "one hundred twenty-nine billion, six hundred sixty-one million, five hundred fifty-three thousand, one hundred thirty-seven".