671622216570 has 128 divisors (see below), whose sum is σ = 1911278592000. Its totient is φ = 167236586496.

The previous prime is 671622216523. The next prime is 671622216571. The reversal of 671622216570 is 75612226176.

671622216570 is a `hidden beast` number, since 6 + 7 + 1 + 62 + 2 + 2 + 16 + 570 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (671622216571) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6856 + ... + 1159004.

It is an arithmetic number, because the mean of its divisors is an integer number (14931864000).

Almost surely, 2^671622216570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671622216570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955639296000).

671622216570 is an abundant number, since it is smaller than the sum of its proper divisors (1239656375430).

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

671622216570 is a wasteful number, since it uses less digits than its factorization.

671622216570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152309 (or 1152303 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 671622216570 in words is "six hundred seventy-one billion, six hundred twenty-two million, two hundred sixteen thousand, five hundred seventy".