1636145113517 has 2 divisors, whose sum is σ = 1636145113518. Its totient is φ = 1636145113516.

The previous prime is 1636145113391. The next prime is 1636145113579. The reversal of 1636145113517 is 7153115416361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1533364600681 + 102780512836 = 1238291^2 + 320594^2 .

It is a cyclic number.

It is not a de Polignac number, because 1636145113517 - 2¹⁴ = 1636145097133 is a prime.

It is a super-2 number, since 2×1636145113517² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1636145113717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818072556758 + 818072556759.

It is an arithmetic number, because the mean of its divisors is an integer number (818072556759).

Almost surely, 2^{1636145113517} is an apocalyptic number.

It is an amenable number.

1636145113517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1636145113517 is an equidigital number, since it uses as much as digits as its factorization.

1636145113517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The spelling of 1636145113517 in words is "one trillion, six hundred thirty-six billion, one hundred forty-five million, one hundred thirteen thousand, five hundred seventeen".