2136756409 has 2 divisors, whose sum is σ = 2136756410. Its totient is φ = 2136756408.

The previous prime is 2136756407. The next prime is 2136756439. The reversal of 2136756409 is 9046576312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2128899600 + 7856809 = 46140^2 + 2803^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136756409 - 2¹ = 2136756407 is a prime.

Together with 2136756407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2136756407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068378204 + 1068378205.

It is an arithmetic number, because the mean of its divisors is an integer number (1068378205).

Almost surely, 2^2136756409 is an apocalyptic number.

It is an amenable number.

2136756409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136756409 is an equidigital number, since it uses as much as digits as its factorization.

2136756409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 2136756409 is about 46225.0625635055. The cubic root of 2136756409 is about 1288.0073413753.

The spelling of 2136756409 in words is "two billion, one hundred thirty-six million, seven hundred fifty-six thousand, four hundred nine".