129820863507 has 16 divisors (see below), whose sum is σ = 177137756928. Its totient is φ = 84526011360.

The previous prime is 129820863503. The next prime is 129820863509. The reversal of 129820863507 is 705368028921.

It is not a de Polignac number, because 129820863507 - 2² = 129820863503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129820863507.

It is not an unprimeable number, because it can be changed into a prime (129820863503) 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, 1396282 + ... + 1486352.

It is an arithmetic number, because the mean of its divisors is an integer number (11071109808).

Almost surely, 2^129820863507 is an apocalyptic number.

129820863507 is a deficient number, since it is larger than the sum of its proper divisors (47316893421).

129820863507 is a wasteful number, since it uses less digits than its factorization.

129820863507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101290.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 129820863507 in words is "one hundred twenty-nine billion, eight hundred twenty million, eight hundred sixty-three thousand, five hundred seven".