7886261656 has 32 divisors (see below), whose sum is σ = 18199067040. Its totient is φ = 3119839488.

The previous prime is 7886261629. The next prime is 7886261687. The reversal of 7886261656 is 6561626887.

It is a junction number, because it is equal to n+sod(n) for n = 7886261597 and 7886261606.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5415661 + ... + 5417116.

It is an arithmetic number, because the mean of its divisors is an integer number (568720845).

Almost surely, 2^7886261656 is an apocalyptic number.

It is an amenable number.

7886261656 is an abundant number, since it is smaller than the sum of its proper divisors (10312805384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7886261656 is a wasteful number, since it uses less digits than its factorization.

7886261656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832803 (or 10832799 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The square root of 7886261656 is about 88804.6263209299. The cubic root of 7886261656 is about 1990.4765283897.

The spelling of 7886261656 in words is "seven billion, eight hundred eighty-six million, two hundred sixty-one thousand, six hundred fifty-six".