671888552805 has 40 divisors (see below), whose sum is σ = 1207217240064. Its totient is φ = 357509052000.

The previous prime is 671888552761. The next prime is 671888552821. The reversal of 671888552805 is 508255888176.

671888552805 is a `hidden beast` number, since 6 + 71 + 8 + 8 + 8 + 552 + 8 + 0 + 5 = 666.

It is not a de Polignac number, because 671888552805 - 2⁷ = 671888552677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1750021 + ... + 2099130.

Almost surely, 2^671888552805 is an apocalyptic number.

It is an amenable number.

671888552805 is a deficient number, since it is larger than the sum of its proper divisors (535328687259).

671888552805 is a wasteful number, since it uses less digits than its factorization.

671888552805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849599 (or 3849590 counting only the distinct ones).

The product of its (nonzero) digits is 43008000, while the sum is 63.

The spelling of 671888552805 in words is "six hundred seventy-one billion, eight hundred eighty-eight million, five hundred fifty-two thousand, eight hundred five".