671387521187000 has 128 divisors (see below), whose sum is σ = 1615374427867200. Its totient is φ = 261070610112000.

The previous prime is 671387521186939. The next prime is 671387521187011. The reversal of 671387521187000 is 781125783176.

It is a super-2 number, since 2×671387521187000² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52331666 + ... + 63885665.

Almost surely, 2^{671387521187000} is an apocalyptic number.

It is an amenable number.

671387521187000 is an abundant number, since it is smaller than the sum of its proper divisors (943986906680200).

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

671387521187000 is a wasteful number, since it uses less digits than its factorization.

671387521187000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116217514 (or 116217500 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 56.

The spelling of 671387521187000 in words is "six hundred seventy-one trillion, three hundred eighty-seven billion, five hundred twenty-one million, one hundred eighty-seven thousand".