129456118450 has 24 divisors (see below), whose sum is σ = 244735736580. Its totient is φ = 50933553600.

The previous prime is 129456118417. The next prime is 129456118483. The reversal of 129456118450 is 54811654921.

It is an interprime number because it is at equal distance from previous prime (129456118417) and next prime (129456118483).

It can be written as a sum of positive squares in 6 ways, for example, as 23824161 + 129432294289 = 4881^2 + 359767^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129456118450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21219265 + ... + 21225364.

Almost surely, 2^129456118450 is an apocalyptic number.

129456118450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129456118450 is a deficient number, since it is larger than the sum of its proper divisors (115279618130).

129456118450 is a wasteful number, since it uses less digits than its factorization.

129456118450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42444702 (or 42444697 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 129456118450 in words is "one hundred twenty-nine billion, four hundred fifty-six million, one hundred eighteen thousand, four hundred fifty".