136450664380321 has 2 divisors, whose sum is σ = 136450664380322. Its totient is φ = 136450664380320.

The previous prime is 136450664380291. The next prime is 136450664380397. The reversal of 136450664380321 is 123083466054631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91414633210000 + 45036031170321 = 9561100^2 + 6710889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136450664380321 is a prime.

It is a super-2 number, since 2×136450664380321² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136450664380621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68225332190160 + 68225332190161.

It is an arithmetic number, because the mean of its divisors is an integer number (68225332190161).

Almost surely, 2^{136450664380321} is an apocalyptic number.

It is an amenable number.

136450664380321 is a deficient number, since it is larger than the sum of its proper divisors (1).

136450664380321 is an equidigital number, since it uses as much as digits as its factorization.

136450664380321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 136450664380321 in words is "one hundred thirty-six trillion, four hundred fifty billion, six hundred sixty-four million, three hundred eighty thousand, three hundred twenty-one".