129732220945 has 16 divisors (see below), whose sum is σ = 155938361040. Its totient is φ = 103612760064.

The previous prime is 129732220901. The next prime is 129732220973. The reversal of 129732220945 is 549022237921.

It can be written as a sum of positive squares in 8 ways, for example, as 281937681 + 129450283264 = 16791^2 + 359792^2 .

It is a cyclic number.

It is not a de Polignac number, because 129732220945 - 2¹⁵ = 129732188177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129732220895 and 129732220904.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12623329 + ... + 12633601.

It is an arithmetic number, because the mean of its divisors is an integer number (9746147565).

Almost surely, 2^129732220945 is an apocalyptic number.

It is an amenable number.

129732220945 is a deficient number, since it is larger than the sum of its proper divisors (26206140095).

129732220945 is a wasteful number, since it uses less digits than its factorization.

129732220945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14244.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 129732220945 in words is "one hundred twenty-nine billion, seven hundred thirty-two million, two hundred twenty thousand, nine hundred forty-five".