129280169697 has 16 divisors (see below), whose sum is σ = 197051245440. Its totient is φ = 73854548352.

The previous prime is 129280169693. The next prime is 129280169701. The reversal of 129280169697 is 796961082921.

It is an interprime number because it is at equal distance from previous prime (129280169693) and next prime (129280169701).

It is not a de Polignac number, because 129280169697 - 2² = 129280169693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129280169697.

It is not an unprimeable number, because it can be changed into a prime (129280169693) 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, 746172 + ... + 902957.

It is an arithmetic number, because the mean of its divisors is an integer number (12315702840).

Almost surely, 2^129280169697 is an apocalyptic number.

It is an amenable number.

129280169697 is a deficient number, since it is larger than the sum of its proper divisors (67771075743).

129280169697 is a wasteful number, since it uses less digits than its factorization.

129280169697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652872.

The product of its (nonzero) digits is 5878656, while the sum is 60.

The spelling of 129280169697 in words is "one hundred twenty-nine billion, two hundred eighty million, one hundred sixty-nine thousand, six hundred ninety-seven".