14781618641 has 2 divisors, whose sum is σ = 14781618642. Its totient is φ = 14781618640.

The previous prime is 14781618629. The next prime is 14781618647. The reversal of 14781618641 is 14681618741.

14781618641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10464471616 + 4317147025 = 102296^2 + 65705^2 .

It is an emirp because it is prime and its reverse (14681618741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14781618641 - 2¹⁸ = 14781356497 is a prime.

It is a super-4 number, since 4×14781618641⁴ (a number of 42 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (14781618647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7390809320 + 7390809321.

It is an arithmetic number, because the mean of its divisors is an integer number (7390809321).

Almost surely, 2^14781618641 is an apocalyptic number.

It is an amenable number.

14781618641 is a deficient number, since it is larger than the sum of its proper divisors (1).

14781618641 is an equidigital number, since it uses as much as digits as its factorization.

14781618641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 47.

The spelling of 14781618641 in words is "fourteen billion, seven hundred eighty-one million, six hundred eighteen thousand, six hundred forty-one".