36663172645523 has 2 divisors, whose sum is σ = 36663172645524. Its totient is φ = 36663172645522.

The previous prime is 36663172645483. The next prime is 36663172645597. The reversal of 36663172645523 is 32554627136663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36663172645523 - 2¹⁶ = 36663172579987 is a prime.

It is a super-2 number, since 2×36663172645523² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36663172645423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18331586322761 + 18331586322762.

It is an arithmetic number, because the mean of its divisors is an integer number (18331586322762).

Almost surely, 2^{36663172645523} is an apocalyptic number.

36663172645523 is a deficient number, since it is larger than the sum of its proper divisors (1).

36663172645523 is an equidigital number, since it uses as much as digits as its factorization.

36663172645523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97977600, while the sum is 59.

The spelling of 36663172645523 in words is "thirty-six trillion, six hundred sixty-three billion, one hundred seventy-two million, six hundred forty-five thousand, five hundred twenty-three".