2136708481 has 4 divisors (see below), whose sum is σ = 2188823364. Its totient is φ = 2084593600.

The previous prime is 2136708451. The next prime is 2136708491. The reversal of 2136708481 is 1848076312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 587577600 + 1549130881 = 24240^2 + 39359^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136708481 - 2²¹ = 2134611329 is a prime.

It is a super-2 number, since 2×2136708481² = 9131046265554654722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2136708421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26057380 + ... + 26057461.

It is an arithmetic number, because the mean of its divisors is an integer number (547205841).

Almost surely, 2^2136708481 is an apocalyptic number.

It is an amenable number.

2136708481 is a deficient number, since it is larger than the sum of its proper divisors (52114883).

2136708481 is an equidigital number, since it uses as much as digits as its factorization.

2136708481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52114882.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 2136708481 is about 46224.5441405321. The cubic root of 2136708481 is about 1287.9977111905.

The spelling of 2136708481 in words is "two billion, one hundred thirty-six million, seven hundred eight thousand, four hundred eighty-one".