145089280681 has 2 divisors, whose sum is σ = 145089280682. Its totient is φ = 145089280680.

The previous prime is 145089280649. The next prime is 145089280733. The reversal of 145089280681 is 186082980541.

It is a happy number.

It is an a-pointer prime, because the next prime (145089280733) can be obtained adding 145089280681 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130381655056 + 14707625625 = 361084^2 + 121275^2 .

It is an emirp because it is prime and its reverse (186082980541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145089280681 - 2⁵ = 145089280649 is a prime.

It is a super-2 number, since 2×145089280681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145089280601) 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, 72544640340 + 72544640341.

It is an arithmetic number, because the mean of its divisors is an integer number (72544640341).

Almost surely, 2^145089280681 is an apocalyptic number.

It is an amenable number.

145089280681 is a deficient number, since it is larger than the sum of its proper divisors (1).

145089280681 is an equidigital number, since it uses as much as digits as its factorization.

145089280681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 145089280681 in words is "one hundred forty-five billion, eighty-nine million, two hundred eighty thousand, six hundred eighty-one".