2651679126805 has 4 divisors (see below), whose sum is σ = 3182014952172. Its totient is φ = 2121343301440.

The previous prime is 2651679126797. The next prime is 2651679126829. The reversal of 2651679126805 is 5086219761562.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1419381538884 + 1232297587921 = 1191378^2 + 1110089^2 .

It is not a de Polignac number, because 2651679126805 - 2³ = 2651679126797 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 2651679126805.

It is a congruent number.

It is an unprimeable number.

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, 265167912676 + ... + 265167912685.

It is an arithmetic number, because the mean of its divisors is an integer number (795503738043).

Almost surely, 2^{2651679126805} is an apocalyptic number.

It is an amenable number.

2651679126805 is a deficient number, since it is larger than the sum of its proper divisors (530335825367).

2651679126805 is an equidigital number, since it uses as much as digits as its factorization.

2651679126805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530335825366.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 2651679126805 in words is "two trillion, six hundred fifty-one billion, six hundred seventy-nine million, one hundred twenty-six thousand, eight hundred five".