145520444501 has 4 divisors (see below), whose sum is σ = 145751063904. Its totient is φ = 145289825100.

The previous prime is 145520444491. The next prime is 145520444549. The reversal of 145520444501 is 105444025541.

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, and also an emirpimes, since its reverse is a distinct semiprime: 105444025541 = 41 ⋅2571805501.

It is a cyclic number.

It is not a de Polignac number, because 145520444501 - 2⁶ = 145520444437 is a prime.

It is a super-2 number, since 2×145520444501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145520444101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115308755 + ... + 115310016.

It is an arithmetic number, because the mean of its divisors is an integer number (36437765976).

Almost surely, 2^145520444501 is an apocalyptic number.

It is an amenable number.

145520444501 is a deficient number, since it is larger than the sum of its proper divisors (230619403).

145520444501 is an equidigital number, since it uses as much as digits as its factorization.

145520444501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230619402.

The product of its (nonzero) digits is 64000, while the sum is 35.

The spelling of 145520444501 in words is "one hundred forty-five billion, five hundred twenty million, four hundred forty-four thousand, five hundred one".