671534351712 has 720 divisors, whose sum is σ = 2427734620080. Its totient is φ = 181062604800.

The previous prime is 671534351699. The next prime is 671534351723. The reversal of 671534351712 is 217153435176.

671534351712 is a `hidden beast` number, since 6 + 71 + 53 + 4 + 3 + 517 + 12 = 666.

It is a super-2 number, since 2×671534351712² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1015936662 + ... + 1015937322.

It is an arithmetic number, because the mean of its divisors is an integer number (3371853639).

Almost surely, 2^671534351712 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 671534351712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213867310040).

671534351712 is an abundant number, since it is smaller than the sum of its proper divisors (1756200268368).

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

671534351712 is a wasteful number, since it uses less digits than its factorization.

671534351712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1113 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

Adding to 671534351712 its reverse (217153435176), we get a palindrome (888687786888).

The spelling of 671534351712 in words is "six hundred seventy-one billion, five hundred thirty-four million, three hundred fifty-one thousand, seven hundred twelve".