13645990425637 has 2 divisors, whose sum is σ = 13645990425638. Its totient is φ = 13645990425636.

The previous prime is 13645990425577. The next prime is 13645990425677. The reversal of 13645990425637 is 73652409954631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8893093372641 + 4752897052996 = 2982129^2 + 2180114^2 .

It is an emirp because it is prime and its reverse (73652409954631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13645990425637 - 2³⁹ = 13096234611749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13645990425677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6822995212818 + 6822995212819.

It is an arithmetic number, because the mean of its divisors is an integer number (6822995212819).

Almost surely, 2^{13645990425637} is an apocalyptic number.

It is an amenable number.

13645990425637 is a deficient number, since it is larger than the sum of its proper divisors (1).

13645990425637 is an equidigital number, since it uses as much as digits as its factorization.

13645990425637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 146966400, while the sum is 64.

The spelling of 13645990425637 in words is "thirteen trillion, six hundred forty-five billion, nine hundred ninety million, four hundred twenty-five thousand, six hundred thirty-seven".