145645120033 has 4 divisors (see below), whose sum is σ = 166451565760. Its totient is φ = 124838674308.

The previous prime is 145645120021. The next prime is 145645120043. The reversal of 145645120033 is 330021546541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145645120033 - 2²¹ = 145643022881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145645120043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10403222853 + ... + 10403222866.

It is an arithmetic number, because the mean of its divisors is an integer number (41612891440).

Almost surely, 2^145645120033 is an apocalyptic number.

It is an amenable number.

145645120033 is a deficient number, since it is larger than the sum of its proper divisors (20806445727).

145645120033 is an equidigital number, since it uses as much as digits as its factorization.

145645120033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20806445726.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 145645120033 its reverse (330021546541), we get a palindrome (475666666574).

The spelling of 145645120033 in words is "one hundred forty-five billion, six hundred forty-five million, one hundred twenty thousand, thirty-three".