145220243205424 has 20 divisors (see below), whose sum is σ = 281370552065136. Its totient is φ = 72608487833792.

The previous prime is 145220243205403. The next prime is 145220243205431. The reversal of 145220243205424 is 424502342022541.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101377084 + ... + 102799579.

Almost surely, 2^{145220243205424} is an apocalyptic number.

It is an amenable number.

145220243205424 is a deficient number, since it is larger than the sum of its proper divisors (136150308859712).

145220243205424 is a wasteful number, since it uses less digits than its factorization.

145220243205424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204221124 (or 204221118 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 40.

Adding to 145220243205424 its reverse (424502342022541), we get a palindrome (569722585227965).

The spelling of 145220243205424 in words is "one hundred forty-five trillion, two hundred twenty billion, two hundred forty-three million, two hundred five thousand, four hundred twenty-four".