129471937056 has 240 divisors, whose sum is σ = 474731167680. Its totient is φ = 33629022720.

The previous prime is 129471937013. The next prime is 129471937079. The reversal of 129471937056 is 650739174921.

129471937056 is a `hidden beast` number, since 12 + 9 + 471 + 93 + 70 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 129471936993 and 129471937011.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 124771 + ... + 523938.

It is an arithmetic number, because the mean of its divisors is an integer number (1978046532).

Almost surely, 2^129471937056 is an apocalyptic number.

129471937056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129471937056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237365583840).

129471937056 is an abundant number, since it is smaller than the sum of its proper divisors (345259230624).

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

129471937056 is a wasteful number, since it uses less digits than its factorization.

129471937056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648749 (or 648732 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 129471937056 in words is "one hundred twenty-nine billion, four hundred seventy-one million, nine hundred thirty-seven thousand, fifty-six".