1452378738647 has 2 divisors, whose sum is σ = 1452378738648. Its totient is φ = 1452378738646.

The previous prime is 1452378738641. The next prime is 1452378738649. The reversal of 1452378738647 is 7468378732541.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7468378732541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1452378738647 - 2²⁴ = 1452361961431 is a prime.

Together with 1452378738649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1452378738641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 726189369323 + 726189369324.

It is an arithmetic number, because the mean of its divisors is an integer number (726189369324).

Almost surely, 2^{1452378738647} is an apocalyptic number.

1452378738647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1452378738647 is an equidigital number, since it uses as much as digits as its factorization.

1452378738647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189665280, while the sum is 65.

The spelling of 1452378738647 in words is "one trillion, four hundred fifty-two billion, three hundred seventy-eight million, seven hundred thirty-eight thousand, six hundred forty-seven".