2136620763217 has 2 divisors, whose sum is σ = 2136620763218. Its totient is φ = 2136620763216.

The previous prime is 2136620763149. The next prime is 2136620763257. The reversal of 2136620763217 is 7123670266312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464235523136 + 672385240081 = 1210056^2 + 819991^2 .

It is a cyclic number.

It is not a de Polignac number, because 2136620763217 - 2³⁵ = 2102261024849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2136620763257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068310381608 + 1068310381609.

It is an arithmetic number, because the mean of its divisors is an integer number (1068310381609).

Almost surely, 2^{2136620763217} is an apocalyptic number.

It is an amenable number.

2136620763217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2136620763217 is an equidigital number, since it uses as much as digits as its factorization.

2136620763217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 2136620763217 in words is "two trillion, one hundred thirty-six billion, six hundred twenty million, seven hundred sixty-three thousand, two hundred seventeen".