671211419554368 has 1344 divisors, whose sum is σ = 2521458848563200. Its totient is φ = 165530222161920.

The previous prime is 671211419554363. The next prime is 671211419554397. The reversal of 671211419554368 is 863455914112176.

It is a happy number.

671211419554368 is a `hidden beast` number, since 6 + 7 + 1 + 2 + 1 + 1 + 4 + 19 + 554 + 3 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (671211419554363) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 81665821363 + ... + 81665829581.

It is an arithmetic number, because the mean of its divisors is an integer number (1876085452800).

Almost surely, 2^{671211419554368} 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 671211419554368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260729424281600).

671211419554368 is an abundant number, since it is smaller than the sum of its proper divisors (1850247429008832).

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

671211419554368 is a wasteful number, since it uses less digits than its factorization.

671211419554368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8860 (or 8847 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 671211419554368 in words is "six hundred seventy-one trillion, two hundred eleven billion, four hundred nineteen million, five hundred fifty-four thousand, three hundred sixty-eight".