671921967905400 has 192 divisors, whose sum is σ = 2118329217360000. Its totient is φ = 176136706117120.

The previous prime is 671921967905369. The next prime is 671921967905429. The reversal of 671921967905400 is 4509769129176.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1190184391 + ... + 1190748809.

It is an arithmetic number, because the mean of its divisors is an integer number (11032964673750).

Almost surely, 2^{671921967905400} is an apocalyptic number.

671921967905400 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 671921967905400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059164608680000).

671921967905400 is an abundant number, since it is smaller than the sum of its proper divisors (1446407249454600).

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

671921967905400 is a wasteful number, since it uses less digits than its factorization.

671921967905400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598126 (or 598117 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 66.

The spelling of 671921967905400 in words is "six hundred seventy-one trillion, nine hundred twenty-one billion, nine hundred sixty-seven million, nine hundred five thousand, four hundred".