671081072850 has 192 divisors, whose sum is σ = 1996141881600. Its totient is φ = 165271518720.

The previous prime is 671081072819. The next prime is 671081072861. The reversal of 671081072850 is 58270180176.

It is a happy number.

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 = 671081072796 and 671081072805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 527814 + ... + 1273086.

It is an arithmetic number, because the mean of its divisors is an integer number (10396572300).

Almost surely, 2^671081072850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671081072850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998070940800).

671081072850 is an abundant number, since it is smaller than the sum of its proper divisors (1325060808750).

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

671081072850 is a wasteful number, since it uses less digits than its factorization.

671081072850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745346 (or 745335 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The spelling of 671081072850 in words is "six hundred seventy-one billion, eighty-one million, seventy-two thousand, eight hundred fifty".