2136802437666 has 48 divisors (see below), whose sum is σ = 5107479020280. Its totient is φ = 641441629440.

The previous prime is 2136802437661. The next prime is 2136802437673. The reversal of 2136802437666 is 6667342086312.

It can be written as a sum of positive squares in 4 ways, for example, as 785696096025 + 1351106341641 = 886395^2 + 1162371^2 .

It is not an unprimeable number, because it can be changed into a prime (2136802437661) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 111351801 + ... + 111370988.

Almost surely, 2^{2136802437666} is an apocalyptic number.

2136802437666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2136802437666 is an abundant number, since it is smaller than the sum of its proper divisors (2970676582614).

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

2136802437666 is a wasteful number, since it uses less digits than its factorization.

2136802437666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222722851 (or 222722848 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 2136802437666 in words is "two trillion, one hundred thirty-six billion, eight hundred two million, four hundred thirty-seven thousand, six hundred sixty-six".