129976445016 has 192 divisors, whose sum is σ = 397361865600. Its totient is φ = 39336200640.

The previous prime is 129976445003. The next prime is 129976445033. The reversal of 129976445016 is 610544679921.

129976445016 is a `hidden beast` number, since 1 + 2 + 9 + 97 + 6 + 44 + 501 + 6 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23702611 + ... + 23708093.

It is an arithmetic number, because the mean of its divisors is an integer number (2069593050).

Almost surely, 2^129976445016 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 129976445016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198680932800).

129976445016 is an abundant number, since it is smaller than the sum of its proper divisors (267385420584).

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

129976445016 is a wasteful number, since it uses less digits than its factorization.

129976445016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427 (or 6406 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 129976445016 in words is "one hundred twenty-nine billion, nine hundred seventy-six million, four hundred forty-five thousand, sixteen".