671004376644888 has 768 divisors, whose sum is σ = 2251025562240000. Its totient is φ = 177745339699200.

The previous prime is 671004376644851. The next prime is 671004376644977. The reversal of 671004376644888 is 888446673400176.

671004376644888 is a `hidden beast` number, since 6 + 7 + 1 + 0 + 0 + 43 + 7 + 66 + 448 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 78032834013 + ... + 78032842611.

It is an arithmetic number, because the mean of its divisors is an integer number (2931022867500).

Almost surely, 2^{671004376644888} 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 671004376644888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125512781120000).

671004376644888 is an abundant number, since it is smaller than the sum of its proper divisors (1580021185595112).

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

671004376644888 is a wasteful number, since it uses less digits than its factorization.

671004376644888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13648 (or 13641 counting only the distinct ones).

The product of its (nonzero) digits is 1040449536, while the sum is 72.

The spelling of 671004376644888 in words is "six hundred seventy-one trillion, four billion, three hundred seventy-six million, six hundred forty-four thousand, eight hundred eighty-eight".