671943590575 has 12 divisors (see below), whose sum is σ = 833293908088. Its totient is φ = 537500772000.

The previous prime is 671943590569. The next prime is 671943590597. The reversal of 671943590575 is 575095349176.

It is a happy number.

It is not a de Polignac number, because 671943590575 - 2²¹ = 671941493423 is a prime.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1098201 + ... + 1596850.

Almost surely, 2^671943590575 is an apocalyptic number.

671943590575 is a deficient number, since it is larger than the sum of its proper divisors (161350317513).

671943590575 is a wasteful number, since it uses less digits than its factorization.

671943590575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705034 (or 2705029 counting only the distinct ones).

The product of its (nonzero) digits is 35721000, while the sum is 61.

The spelling of 671943590575 in words is "six hundred seventy-one billion, nine hundred forty-three million, five hundred ninety thousand, five hundred seventy-five".