2681636500 has 24 divisors (see below), whose sum is σ = 5856695208. Its totient is φ = 1072654400.

The previous prime is 2681636449. The next prime is 2681636513. The reversal of 2681636500 is 56361862.

It can be written as a sum of positive squares in 4 ways, for example, as 420824196 + 2260812304 = 20514^2 + 47548^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2681636500.

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, 2681137 + ... + 2682136.

It is an arithmetic number, because the mean of its divisors is an integer number (244028967).

Almost surely, 2^2681636500 is an apocalyptic number.

2681636500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2681636500 is an abundant number, since it is smaller than the sum of its proper divisors (3175058708).

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

2681636500 is a wasteful number, since it uses less digits than its factorization.

2681636500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363292 (or 5363280 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2681636500 is about 51784.5198877039. The cubic root of 2681636500 is about 1389.3125838602.

The spelling of 2681636500 in words is "two billion, six hundred eighty-one million, six hundred thirty-six thousand, five hundred".