129475849356 has 240 divisors, whose sum is σ = 394801200640. Its totient is φ = 36237715200.

The previous prime is 129475849297. The next prime is 129475849367. The reversal of 129475849356 is 653948574921.

129475849356 is a `hidden beast` number, since 1 + 2 + 9 + 47 + 58 + 493 + 56 = 666.

It is a super-2 number, since 2×129475849356² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 129475849293 and 129475849302.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 24997575 + ... + 25002753.

Almost surely, 2^129475849356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129475849356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197400600320).

129475849356 is an abundant number, since it is smaller than the sum of its proper divisors (265325351284).

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

129475849356 is a wasteful number, since it uses less digits than its factorization.

129475849356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5426 (or 5415 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 63.

The spelling of 129475849356 in words is "one hundred twenty-nine billion, four hundred seventy-five million, eight hundred forty-nine thousand, three hundred fifty-six".