879643026261 has 32 divisors (see below), whose sum is σ = 1311447252480. Its totient is φ = 582717665088.

The previous prime is 879643026253. The next prime is 879643026281. The reversal of 879643026261 is 162620346978.

879643026261 is a `hidden beast` number, since 8 + 7 + 9 + 6 + 4 + 3 + 0 + 2 + 626 + 1 = 666.

It is not a de Polignac number, because 879643026261 - 2³ = 879643026253 is a prime.

It is a super-2 number, since 2×879643026261² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 879643026198 and 879643026207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879643026281) 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 31 ways as a sum of consecutive naturals, for example, 2584555 + ... + 2905031.

It is an arithmetic number, because the mean of its divisors is an integer number (40982726640).

Almost surely, 2^879643026261 is an apocalyptic number.

It is an amenable number.

879643026261 is a deficient number, since it is larger than the sum of its proper divisors (431804226219).

879643026261 is a wasteful number, since it uses less digits than its factorization.

879643026261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321130 (or 321124 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 879643026261 in words is "eight hundred seventy-nine billion, six hundred forty-three million, twenty-six thousand, two hundred sixty-one".