671557282616 has 64 divisors (see below), whose sum is σ = 1397189520000. Its totient is φ = 300022047360.

The previous prime is 671557282577. The next prime is 671557282631. The reversal of 671557282616 is 616282755176.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38811935 + ... + 38829233.

It is an arithmetic number, because the mean of its divisors is an integer number (21831086250).

Almost surely, 2^671557282616 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 671557282616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698594760000).

671557282616 is an abundant number, since it is smaller than the sum of its proper divisors (725632237384).

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

671557282616 is a wasteful number, since it uses less digits than its factorization.

671557282616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24852 (or 24848 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 56.

The spelling of 671557282616 in words is "six hundred seventy-one billion, five hundred fifty-seven million, two hundred eighty-two thousand, six hundred sixteen".