2641391279 has 4 divisors (see below), whose sum is σ = 2645400120. Its totient is φ = 2637382440.

The previous prime is 2641391273. The next prime is 2641391287. The reversal of 2641391279 is 9721931462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2641391279 - 2²⁰ = 2640342703 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 (2641391273) 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 3 ways as a sum of consecutive naturals, for example, 2003432 + ... + 2004749.

It is an arithmetic number, because the mean of its divisors is an integer number (661350030).

Almost surely, 2^2641391279 is an apocalyptic number.

2641391279 is a deficient number, since it is larger than the sum of its proper divisors (4008841).

2641391279 is an equidigital number, since it uses as much as digits as its factorization.

2641391279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008840.

The product of its digits is 163296, while the sum is 44.

The square root of 2641391279 is about 51394.4673967928. The cubic root of 2641391279 is about 1382.3273893936.

The spelling of 2641391279 in words is "two billion, six hundred forty-one million, three hundred ninety-one thousand, two hundred seventy-nine".