63726651140209 has 2 divisors, whose sum is σ = 63726651140210. Its totient is φ = 63726651140208.

The previous prime is 63726651140183. The next prime is 63726651140261. The reversal of 63726651140209 is 90204115662736.

It is an a-pointer prime, because the next prime (63726651140261) can be obtained adding 63726651140209 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54794341382400 + 8932309757809 = 7402320^2 + 2988697^2 .

It is a cyclic number.

It is not a de Polignac number, because 63726651140209 - 2¹³ = 63726651132017 is a prime.

It is a super-2 number, since 2×63726651140209² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63726651110209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31863325570104 + 31863325570105.

It is an arithmetic number, because the mean of its divisors is an integer number (31863325570105).

Almost surely, 2^{63726651140209} is an apocalyptic number.

It is an amenable number.

63726651140209 is a deficient number, since it is larger than the sum of its proper divisors (1).

63726651140209 is an equidigital number, since it uses as much as digits as its factorization.

63726651140209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 63726651140209 in words is "sixty-three trillion, seven hundred twenty-six billion, six hundred fifty-one million, one hundred forty thousand, two hundred nine".