129720864001 has 16 divisors (see below), whose sum is σ = 136497477888. Its totient is φ = 123168643200.

The previous prime is 129720863981. The next prime is 129720864061. The reversal of 129720864001 is 100468027921.

It is a cyclic number.

It is not a de Polignac number, because 129720864001 - 2¹⁹ = 129720339713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129720864061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100615 + ... + 519196.

It is an arithmetic number, because the mean of its divisors is an integer number (8531092368).

Almost surely, 2^129720864001 is an apocalyptic number.

It is an amenable number.

129720864001 is a deficient number, since it is larger than the sum of its proper divisors (6776613887).

129720864001 is an equidigital number, since it uses as much as digits as its factorization.

129720864001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619992.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 129720864001 in words is "one hundred twenty-nine billion, seven hundred twenty million, eight hundred sixty-four thousand, one".