671312535644 has 12 divisors (see below), whose sum is σ = 1175752842600. Its totient is φ = 335383152048.

The previous prime is 671312535629. The next prime is 671312535731. The reversal of 671312535644 is 446535213176.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68273414 + ... + 68283245.

It is an arithmetic number, because the mean of its divisors is an integer number (97979403550).

Almost surely, 2^671312535644 is an apocalyptic number.

It is an amenable number.

671312535644 is a deficient number, since it is larger than the sum of its proper divisors (504440306956).

671312535644 is a wasteful number, since it uses less digits than its factorization.

671312535644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136557892 (or 136557890 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 47.

The spelling of 671312535644 in words is "six hundred seventy-one billion, three hundred twelve million, five hundred thirty-five thousand, six hundred forty-four".