129537098856 has 192 divisors, whose sum is σ = 396394689600. Its totient is φ = 39165920640.

The previous prime is 129537098849. The next prime is 129537098857. The reversal of 129537098856 is 658890735921.

129537098856 is a `hidden beast` number, since 1 + 2 + 9 + 537 + 0 + 98 + 8 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 129537098793 and 129537098802.

It is not an unprimeable number, because it can be changed into a prime (129537098857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12200206 + ... + 12210818.

It is an arithmetic number, because the mean of its divisors is an integer number (2064555675).

Almost surely, 2^129537098856 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 129537098856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198197344800).

129537098856 is an abundant number, since it is smaller than the sum of its proper divisors (266857590744).

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

129537098856 is a wasteful number, since it uses less digits than its factorization.

129537098856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11117 (or 11096 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 129537098856 in words is "one hundred twenty-nine billion, five hundred thirty-seven million, ninety-eight thousand, eight hundred fifty-six".