129541291216 has 20 divisors (see below), whose sum is σ = 251021976100. Its totient is φ = 64761426432.

The previous prime is 129541291193. The next prime is 129541291247. The reversal of 129541291216 is 612192145921.

It can be written as a sum of positive squares in 2 ways, for example, as 46700938816 + 82840352400 = 216104^2 + 287820^2 .

It is a super-2 number, since 2×129541291216² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 459561 + ... + 685768.

It is an arithmetic number, because the mean of its divisors is an integer number (12551098805).

Almost surely, 2^129541291216 is an apocalyptic number.

129541291216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129541291216 is a deficient number, since it is larger than the sum of its proper divisors (121480684884).

129541291216 is a wasteful number, since it uses less digits than its factorization.

129541291216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152406 (or 1152400 counting only the distinct ones).

The product of its digits is 77760, while the sum is 43.

The spelling of 129541291216 in words is "one hundred twenty-nine billion, five hundred forty-one million, two hundred ninety-one thousand, two hundred sixteen".