1641664264279 has 8 divisors (see below), whose sum is σ = 1771731889200. Its totient is φ = 1512137462016.

The previous prime is 1641664264241. The next prime is 1641664264283. The reversal of 1641664264279 is 9724624661461.

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 1641664264279 - 2²⁷ = 1641530046551 is a prime.

It is a super-2 number, since 2×1641664264279² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641664264379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135199354 + ... + 135211495.

It is an arithmetic number, because the mean of its divisors is an integer number (221466486150).

Almost surely, 2^{1641664264279} is an apocalyptic number.

1641664264279 is a deficient number, since it is larger than the sum of its proper divisors (130067624921).

1641664264279 is a wasteful number, since it uses less digits than its factorization.

1641664264279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270411329.

The product of its digits is 20901888, while the sum is 58.

The spelling of 1641664264279 in words is "one trillion, six hundred forty-one billion, six hundred sixty-four million, two hundred sixty-four thousand, two hundred seventy-nine".