671894566108641 has 48 divisors (see below), whose sum is σ = 984408791034240. Its totient is φ = 441559374600960.

The previous prime is 671894566108489. The next prime is 671894566108651. The reversal of 671894566108641 is 146801665498176.

671894566108641 is a `hidden beast` number, since 6 + 7 + 1 + 8 + 9 + 4 + 566 + 10 + 8 + 6 + 41 = 666.

671894566108641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671894566108641 - 2²² = 671894561914337 is a prime.

It is a super-2 number, since 2×671894566108641² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 671894566108641.

It is not an unprimeable number, because it can be changed into a prime (671894566108651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 294858901 + ... + 297128861.

It is an arithmetic number, because the mean of its divisors is an integer number (20508516479880).

Almost surely, 2^{671894566108641} is an apocalyptic number.

It is an amenable number.

671894566108641 is a deficient number, since it is larger than the sum of its proper divisors (312514224925599).

671894566108641 is a wasteful number, since it uses less digits than its factorization.

671894566108641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271526 (or 2271523 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 671894566108641 in words is "six hundred seventy-one trillion, eight hundred ninety-four billion, five hundred sixty-six million, one hundred eight thousand, six hundred forty-one".