145120440023443 has 4 divisors (see below), whose sum is σ = 148208108960160. Its totient is φ = 142032771086728.

The previous prime is 145120440023357. The next prime is 145120440023467. The reversal of 145120440023443 is 344320044021541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145120440023443 - 2¹⁷ = 145120439892371 is a prime.

It is a super-2 number, since 2×145120440023443² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145120440020443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1543834468288 + ... + 1543834468381.

It is an arithmetic number, because the mean of its divisors is an integer number (37052027240040).

Almost surely, 2^{145120440023443} is an apocalyptic number.

145120440023443 is a deficient number, since it is larger than the sum of its proper divisors (3087668936717).

145120440023443 is an equidigital number, since it uses as much as digits as its factorization.

145120440023443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087668936716.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 145120440023443 its reverse (344320044021541), we get a palindrome (489440484044984).

The spelling of 145120440023443 in words is "one hundred forty-five trillion, one hundred twenty billion, four hundred forty million, twenty-three thousand, four hundred forty-three".