671947161600 has 912 divisors, whose sum is σ = 2621267228160. Its totient is φ = 149736652800.

The previous prime is 671947161569. The next prime is 671947161617. The reversal of 671947161600 is 6161749176.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 671947161600.

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, 2811494281 + ... + 2811494519.

Almost surely, 2^671947161600 is an apocalyptic number.

671947161600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671947161600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1310633614080).

671947161600 is an abundant number, since it is smaller than the sum of its proper divisors (1949320066560).

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

671947161600 is a wasteful number, since it uses less digits than its factorization.

671947161600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 671947161600 in words is "six hundred seventy-one billion, nine hundred forty-seven million, one hundred sixty-one thousand, six hundred".