129093397056 has 224 divisors, whose sum is σ = 412679205120. Its totient is φ = 39334699008.

The previous prime is 129093397031. The next prime is 129093397057. The reversal of 129093397056 is 650793390921.

It is a happy number.

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 = 129093396993 and 129093397011.

It is not an unprimeable number, because it can be changed into a prime (129093397057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2285896 + ... + 2341688.

It is an arithmetic number, because the mean of its divisors is an integer number (1842317880).

Almost surely, 2^129093397056 is an apocalyptic number.

129093397056 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 129093397056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206339602560).

129093397056 is an abundant number, since it is smaller than the sum of its proper divisors (283585808064).

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

129093397056 is a wasteful number, since it uses less digits than its factorization.

129093397056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55930 (or 55914 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 54.

The spelling of 129093397056 in words is "one hundred twenty-nine billion, ninety-three million, three hundred ninety-seven thousand, fifty-six".