129550264398 has 12 divisors (see below), whose sum is σ = 280692239568. Its totient is φ = 43183421460.

The previous prime is 129550264343. The next prime is 129550264399. The reversal of 129550264398 is 893462055921.

129550264398 is a `hidden beast` number, since 1 + 2 + 9 + 5 + 502 + 6 + 43 + 98 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129550264399) 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 5 ways as a sum of consecutive naturals, for example, 3598618438 + ... + 3598618473.

It is an arithmetic number, because the mean of its divisors is an integer number (23391019964).

Almost surely, 2^129550264398 is an apocalyptic number.

129550264398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129550264398 is an abundant number, since it is smaller than the sum of its proper divisors (151141975170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129550264398 is a wasteful number, since it uses less digits than its factorization.

129550264398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7197236919 (or 7197236916 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 129550264398 in words is "one hundred twenty-nine billion, five hundred fifty million, two hundred sixty-four thousand, three hundred ninety-eight".