2686556862 has 64 divisors (see below), whose sum is σ = 6522405120. Its totient is φ = 812916000.

The previous prime is 2686556849. The next prime is 2686556891.

2686556862 is a `hidden beast` number, since 2 + 6 + 8 + 6 + 556 + 86 + 2 = 666.

2686556862 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 2686556799 and 2686556808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 456237 + ... + 462087.

It is an arithmetic number, because the mean of its divisors is an integer number (101912580).

Almost surely, 2^2686556862 is an apocalyptic number.

2686556862 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2686556862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3261202560).

2686556862 is an abundant number, since it is smaller than the sum of its proper divisors (3835848258).

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

2686556862 is a wasteful number, since it uses less digits than its factorization.

2686556862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646 (or 6640 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The square root of 2686556862 is about 51832.0061544988. The cubic root of 2686556862 is about 1390.1617847332.

The spelling of 2686556862 in words is "two billion, six hundred eighty-six million, five hundred fifty-six thousand, eight hundred sixty-two".