2581942679 has 4 divisors (see below), whose sum is σ = 2589383784. Its totient is φ = 2574501576.

The previous prime is 2581942607. The next prime is 2581942729. The reversal of 2581942679 is 9762491852.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2581942679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2581942679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581942879) 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 3 ways as a sum of consecutive naturals, for example, 3720032 + ... + 3720725.

It is an arithmetic number, because the mean of its divisors is an integer number (647345946).

Almost surely, 2^2581942679 is an apocalyptic number.

2581942679 is a deficient number, since it is larger than the sum of its proper divisors (7441105).

2581942679 is an equidigital number, since it uses as much as digits as its factorization.

2581942679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441104.

The product of its digits is 2177280, while the sum is 53.

The square root of 2581942679 is about 50812.8200260525. The cubic root of 2581942679 is about 1371.8781279250.

The spelling of 2581942679 in words is "two billion, five hundred eighty-one million, nine hundred forty-two thousand, six hundred seventy-nine".