4191989761 has 8 divisors (see below), whose sum is σ = 4450295520. Its totient is φ = 3934986048.

The previous prime is 4191989743. The next prime is 4191989771. The reversal of 4191989761 is 1679891914.

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 4191989761 - 2¹³ = 4191981569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4191989731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318871 + ... + 331756.

It is an arithmetic number, because the mean of its divisors is an integer number (556286940).

Almost surely, 2^4191989761 is an apocalyptic number.

It is an amenable number.

4191989761 is a deficient number, since it is larger than the sum of its proper divisors (258305759).

4191989761 is a wasteful number, since it uses less digits than its factorization.

4191989761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651023.

The product of its digits is 979776, while the sum is 55.

The square root of 4191989761 is about 64745.5771539647. The cubic root of 4191989761 is about 1612.4022830115.

The spelling of 4191989761 in words is "four billion, one hundred ninety-one million, nine hundred eighty-nine thousand, seven hundred sixty-one".