129618077530 has 16 divisors (see below), whose sum is σ = 233481509064. Its totient is φ = 51809682240.

The previous prime is 129618077521. The next prime is 129618077531. The reversal of 129618077530 is 35770816921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 127941420721 + 1676656809 = 357689^2 + 40947^2 .

It is not an unprimeable number, because it can be changed into a prime (129618077531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4679097 + ... + 4706716.

Almost surely, 2^129618077530 is an apocalyptic number.

129618077530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129618077530 is a deficient number, since it is larger than the sum of its proper divisors (103863431534).

129618077530 is a wasteful number, since it uses less digits than its factorization.

129618077530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9387201.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 129618077530 in words is "one hundred twenty-nine billion, six hundred eighteen million, seventy-seven thousand, five hundred thirty".