671789311760 has 160 divisors (see below), whose sum is σ = 1848204754944. Its totient is φ = 222222528000.

The previous prime is 671789311693. The next prime is 671789311769. The reversal of 671789311760 is 67113987176.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 671789311696 and 671789311705.

It is not an unprimeable number, because it can be changed into a prime (671789311769) 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, 5687705 + ... + 5804615.

Almost surely, 2^671789311760 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 671789311760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924102377472).

671789311760 is an abundant number, since it is smaller than the sum of its proper divisors (1176415443184).

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

671789311760 is a wasteful number, since it uses less digits than its factorization.

671789311760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117293 (or 117287 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 56.

The spelling of 671789311760 in words is "six hundred seventy-one billion, seven hundred eighty-nine million, three hundred eleven thousand, seven hundred sixty".