671901554133 has 12 divisors (see below), whose sum is σ = 970532272320. Its totient is φ = 447930767016.

The previous prime is 671901554123. The next prime is 671901554147. The reversal of 671901554133 is 331455109176.

671901554133 is a `hidden beast` number, since 6 + 7 + 1 + 90 + 1 + 554 + 1 + 3 + 3 = 666.

It is not a de Polignac number, because 671901554133 - 2¹⁰ = 671901553109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671901554113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370308 + ... + 1794866.

It is an arithmetic number, because the mean of its divisors is an integer number (80877689360).

Almost surely, 2^671901554133 is an apocalyptic number.

It is an amenable number.

671901554133 is a deficient number, since it is larger than the sum of its proper divisors (298630718187).

671901554133 is a wasteful number, since it uses less digits than its factorization.

671901554133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600408 (or 600405 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 671901554133 in words is "six hundred seventy-one billion, nine hundred one million, five hundred fifty-four thousand, one hundred thirty-three".