1641164471 has 8 divisors (see below), whose sum is σ = 1748957184. Its totient is φ = 1536408280.

The previous prime is 1641164461. The next prime is 1641164477. The reversal of 1641164471 is 1744611461.

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

It is not a de Polignac number, because 1641164471 - 2²⁶ = 1574055607 is a prime.

It is a super-3 number, since 3×1641164471³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641164477) 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, 758015 + ... + 760176.

It is an arithmetic number, because the mean of its divisors is an integer number (218619648).

Almost surely, 2^1641164471 is an apocalyptic number.

1641164471 is a deficient number, since it is larger than the sum of its proper divisors (107792713).

1641164471 is a wasteful number, since it uses less digits than its factorization.

1641164471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518261.

The product of its digits is 16128, while the sum is 35.

The square root of 1641164471 is about 40511.2881923051. The cubic root of 1641164471 is about 1179.5527537552.

The spelling of 1641164471 in words is "one billion, six hundred forty-one million, one hundred sixty-four thousand, four hundred seventy-one".