145427739841 has 2 divisors, whose sum is σ = 145427739842. Its totient is φ = 145427739840.

The previous prime is 145427739839. The next prime is 145427739869. The reversal of 145427739841 is 148937724541.

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., 122958929025 + 22468810816 = 350655^2 + 149896^2 .

It is an emirp because it is prime and its reverse (148937724541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145427739841 - 2¹ = 145427739839 is a prime.

It is a super-2 number, since 2×145427739841² (a number of 23 digits) contains 22 as substring.

Together with 145427739839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145427739341) 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, 72713869920 + 72713869921.

It is an arithmetic number, because the mean of its divisors is an integer number (72713869921).

Almost surely, 2^145427739841 is an apocalyptic number.

It is an amenable number.

145427739841 is a deficient number, since it is larger than the sum of its proper divisors (1).

145427739841 is an equidigital number, since it uses as much as digits as its factorization.

145427739841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 55.

The spelling of 145427739841 in words is "one hundred forty-five billion, four hundred twenty-seven million, seven hundred thirty-nine thousand, eight hundred forty-one".