145504028517121 has 4 divisors (see below), whose sum is σ = 153162135281200. Its totient is φ = 137845921753044.

The previous prime is 145504028516999. The next prime is 145504028517163. The reversal of 145504028517121 is 121715820405541.

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 145504028517121 - 2⁴⁷ = 4766540161793 is a prime.

It is a super-2 number, since 2×145504028517121² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145504028517181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3829053382011 + ... + 3829053382048.

It is an arithmetic number, because the mean of its divisors is an integer number (38290533820300).

Almost surely, 2^{145504028517121} is an apocalyptic number.

It is an amenable number.

145504028517121 is a deficient number, since it is larger than the sum of its proper divisors (7658106764079).

145504028517121 is an equidigital number, since it uses as much as digits as its factorization.

145504028517121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7658106764078.

The product of its (nonzero) digits is 448000, while the sum is 46.

The spelling of 145504028517121 in words is "one hundred forty-five trillion, five hundred four billion, twenty-eight million, five hundred seventeen thousand, one hundred twenty-one".