129061455972 has 12 divisors (see below), whose sum is σ = 301143397296. Its totient is φ = 43020485320.

The previous prime is 129061455947. The next prime is 129061455997. The reversal of 129061455972 is 279554160921.

It is an interprime number because it is at equal distance from previous prime (129061455947) and next prime (129061455997).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×129061455972² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5377560654 + ... + 5377560677.

It is an arithmetic number, because the mean of its divisors is an integer number (25095283108).

Almost surely, 2^129061455972 is an apocalyptic number.

129061455972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129061455972 is an abundant number, since it is smaller than the sum of its proper divisors (172081941324).

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

129061455972 is a wasteful number, since it uses less digits than its factorization.

129061455972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10755121338 (or 10755121336 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 129061455972 in words is "one hundred twenty-nine billion, sixty-one million, four hundred fifty-five thousand, nine hundred seventy-two".