4991745671 has 8 divisors (see below), whose sum is σ = 5452594704. Its totient is φ = 4532072320.

The previous prime is 4991745659. The next prime is 4991745677. The reversal of 4991745671 is 1765471994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4991745671 - 2²⁶ = 4924636807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991745677) 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 7 ways as a sum of consecutive naturals, for example, 285026 + ... + 302031.

It is an arithmetic number, because the mean of its divisors is an integer number (681574338).

Almost surely, 2^4991745671 is an apocalyptic number.

4991745671 is a deficient number, since it is larger than the sum of its proper divisors (460849033).

4991745671 is a wasteful number, since it uses less digits than its factorization.

4991745671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587841.

The product of its digits is 1905120, while the sum is 53.

The square root of 4991745671 is about 70652.2870896619. The cubic root of 4991745671 is about 1709.0344481208.

The spelling of 4991745671 in words is "four billion, nine hundred ninety-one million, seven hundred forty-five thousand, six hundred seventy-one".