147778133338081 has 2 divisors, whose sum is σ = 147778133338082. Its totient is φ = 147778133338080.

The previous prime is 147778133338079. The next prime is 147778133338111. The reversal of 147778133338081 is 180833331877741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127856050949025 + 19922082389056 = 11307345^2 + 4463416^2 .

It is a cyclic number.

It is not a de Polignac number, because 147778133338081 - 2¹ = 147778133338079 is a prime.

It is a super-2 number, since 2×147778133338081² (a number of 29 digits) contains 22 as substring.

Together with 147778133338079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (147778133338981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73889066669040 + 73889066669041.

It is an arithmetic number, because the mean of its divisors is an integer number (73889066669041).

Almost surely, 2^{147778133338081} is an apocalyptic number.

It is an amenable number.

147778133338081 is a deficient number, since it is larger than the sum of its proper divisors (1).

147778133338081 is an equidigital number, since it uses as much as digits as its factorization.

147778133338081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56899584, while the sum is 64.

The spelling of 147778133338081 in words is "one hundred forty-seven trillion, seven hundred seventy-eight billion, one hundred thirty-three million, three hundred thirty-eight thousand, eighty-one".