671198788544 has 224 divisors, whose sum is σ = 1421021491200. Its totient is φ = 314121830400.

The previous prime is 671198788541. The next prime is 671198788571. The reversal of 671198788544 is 445887891176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671198788541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2371727027 + ... + 2371727309.

Almost surely, 2^671198788544 is an apocalyptic number.

671198788544 is a gapful number since it is divisible by the number (64) 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 671198788544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710510745600).

671198788544 is an abundant number, since it is smaller than the sum of its proper divisors (749822702656).

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

671198788544 is a wasteful number, since it uses less digits than its factorization.

671198788544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 649 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 68.

The spelling of 671198788544 in words is "six hundred seventy-one billion, one hundred ninety-eight million, seven hundred eighty-eight thousand, five hundred forty-four".