80129723850 has 576 divisors, whose sum is σ = 253951746048. Its totient is φ = 18615744000.

The previous prime is 80129723837. The next prime is 80129723879. The reversal of 80129723850 is 5832792108.

It is a happy number.

80129723850 is a `hidden beast` number, since 80 + 1 + 297 + 238 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 80129723796 and 80129723805.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 419527255 + ... + 419527445.

It is an arithmetic number, because the mean of its divisors is an integer number (440888448).

Almost surely, 2^80129723850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80129723850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126975873024).

80129723850 is an abundant number, since it is smaller than the sum of its proper divisors (173822022198).

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

80129723850 is a wasteful number, since it uses less digits than its factorization.

80129723850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 80129723850 in words is "eighty billion, one hundred twenty-nine million, seven hundred twenty-three thousand, eight hundred fifty".