671894852913 has 48 divisors (see below), whose sum is σ = 1010983231440. Its totient is φ = 429604964352.

The previous prime is 671894852857. The next prime is 671894852953. The reversal of 671894852913 is 319258498176.

671894852913 is a `hidden beast` number, since 6 + 7 + 1 + 8 + 94 + 8 + 529 + 13 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 45671109264 + 626223743649 = 213708^2 + 791343^2 .

It is not a de Polignac number, because 671894852913 - 2⁹ = 671894852401 is a prime.

It is a super-3 number, since 3×671894852913³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (671894852953) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47954653 + ... + 47968661.

It is an arithmetic number, because the mean of its divisors is an integer number (21062150655).

Almost surely, 2^671894852913 is an apocalyptic number.

It is an amenable number.

671894852913 is a deficient number, since it is larger than the sum of its proper divisors (339088378527).

671894852913 is a wasteful number, since it uses less digits than its factorization.

671894852913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16098 (or 16095 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 671894852913 in words is "six hundred seventy-one billion, eight hundred ninety-four million, eight hundred fifty-two thousand, nine hundred thirteen".