129195186401 has 4 divisors (see below), whose sum is σ = 129271230000. Its totient is φ = 129119142804.

The previous prime is 129195186353. The next prime is 129195186409. The reversal of 129195186401 is 104681591921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129195186401 - 2¹⁰ = 129195185377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129195186409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38019251 + ... + 38022648.

It is an arithmetic number, because the mean of its divisors is an integer number (32317807500).

Almost surely, 2^129195186401 is an apocalyptic number.

It is an amenable number.

129195186401 is a deficient number, since it is larger than the sum of its proper divisors (76043599).

129195186401 is an equidigital number, since it uses as much as digits as its factorization.

129195186401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76043598.

The product of its (nonzero) digits is 155520, while the sum is 47.

The spelling of 129195186401 in words is "one hundred twenty-nine billion, one hundred ninety-five million, one hundred eighty-six thousand, four hundred one".