129940969845 has 8 divisors (see below), whose sum is σ = 207905551776. Its totient is φ = 69301850576.

The previous prime is 129940969841. The next prime is 129940969849. The reversal of 129940969845 is 548969049921.

It is an interprime number because it is at equal distance from previous prime (129940969841) and next prime (129940969849).

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

It is a cyclic number.

It is not a de Polignac number, because 129940969845 - 2² = 129940969841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129940969841) 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, 4331365647 + ... + 4331365676.

It is an arithmetic number, because the mean of its divisors is an integer number (25988193972).

Almost surely, 2^129940969845 is an apocalyptic number.

129940969845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129940969845 is a deficient number, since it is larger than the sum of its proper divisors (77964581931).

129940969845 is an equidigital number, since it uses as much as digits as its factorization.

129940969845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662731331.

The product of its (nonzero) digits is 50388480, while the sum is 66.

The spelling of 129940969845 in words is "one hundred twenty-nine billion, nine hundred forty million, nine hundred sixty-nine thousand, eight hundred forty-five".