145888857409 has 2 divisors, whose sum is σ = 145888857410. Its totient is φ = 145888857408.

The previous prime is 145888857353. The next prime is 145888857451. The reversal of 145888857409 is 904758888541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74663923009 + 71224934400 = 273247^2 + 266880^2 .

It is an emirp because it is prime and its reverse (904758888541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145888857409 is a prime.

It is a super-2 number, since 2×145888857409² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145888857479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72944428704 + 72944428705.

It is an arithmetic number, because the mean of its divisors is an integer number (72944428705).

Almost surely, 2^145888857409 is an apocalyptic number.

It is an amenable number.

145888857409 is a deficient number, since it is larger than the sum of its proper divisors (1).

145888857409 is an equidigital number, since it uses as much as digits as its factorization.

145888857409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103219200, while the sum is 67.

The spelling of 145888857409 in words is "one hundred forty-five billion, eight hundred eighty-eight million, eight hundred fifty-seven thousand, four hundred nine".