2136719777 has 2 divisors, whose sum is σ = 2136719778. Its totient is φ = 2136719776.

The previous prime is 2136719723. The next prime is 2136719779. The reversal of 2136719777 is 7779176312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2127423376 + 9296401 = 46124^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136719777 - 2⁸ = 2136719521 is a prime.

Together with 2136719779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2136719779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068359888 + 1068359889.

It is an arithmetic number, because the mean of its divisors is an integer number (1068359889).

Almost surely, 2^2136719777 is an apocalyptic number.

It is an amenable number.

2136719777 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136719777 is an equidigital number, since it uses as much as digits as its factorization.

2136719777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777924, while the sum is 50.

The square root of 2136719777 is about 46224.6663265404. Note that the first 3 decimals coincide. The cubic root of 2136719777 is about 1287.9999809116. Note that the first 4 decimals are identical.

The spelling of 2136719777 in words is "two billion, one hundred thirty-six million, seven hundred nineteen thousand, seven hundred seventy-seven".