129371620365 has 64 divisors (see below), whose sum is σ = 250239628800. Its totient is φ = 63033956352.

The previous prime is 129371620361. The next prime is 129371620373. The reversal of 129371620365 is 563026173921.

129371620365 is a `hidden beast` number, since 12 + 9 + 3 + 7 + 1 + 620 + 3 + 6 + 5 = 666.

It is not a de Polignac number, because 129371620365 - 2² = 129371620361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 129371620365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129371620361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 209745 + ... + 550214.

It is an arithmetic number, because the mean of its divisors is an integer number (3909994200).

Almost surely, 2^129371620365 is an apocalyptic number.

129371620365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129371620365 is a deficient number, since it is larger than the sum of its proper divisors (120868008435).

129371620365 is a wasteful number, since it uses less digits than its factorization.

129371620365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760083 (or 760077 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 129371620365 in words is "one hundred twenty-nine billion, three hundred seventy-one million, six hundred twenty thousand, three hundred sixty-five".