1641423791 has 8 divisors (see below), whose sum is σ = 1883214240. Its totient is φ = 1401458688.

The previous prime is 1641423779. The next prime is 1641423793. The reversal of 1641423791 is 1973241461.

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

It is not a de Polignac number, because 1641423791 - 2²⁶ = 1574314927 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 (1641423793) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 454406 + ... + 458003.

It is an arithmetic number, because the mean of its divisors is an integer number (235401780).

Almost surely, 2^1641423791 is an apocalyptic number.

1641423791 is a deficient number, since it is larger than the sum of its proper divisors (241790449).

1641423791 is an equidigital number, since it uses as much as digits as its factorization.

1641423791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912673.

The product of its digits is 36288, while the sum is 38.

The square root of 1641423791 is about 40514.4886552947. The cubic root of 1641423791 is about 1179.6148774314.

The spelling of 1641423791 in words is "one billion, six hundred forty-one million, four hundred twenty-three thousand, seven hundred ninety-one".