145105532123 has 4 divisors (see below), whose sum is σ = 145124535120. Its totient is φ = 145086529128.

The previous prime is 145105532053. The next prime is 145105532147. The reversal of 145105532123 is 321235501541.

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 145105532123 - 2⁸ = 145105531867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145105532123.

It is not an unprimeable number, because it can be changed into a prime (145105532153) 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, 9490040 + ... + 9505317.

It is an arithmetic number, because the mean of its divisors is an integer number (36281133780).

Almost surely, 2^145105532123 is an apocalyptic number.

145105532123 is a deficient number, since it is larger than the sum of its proper divisors (19002997).

145105532123 is an equidigital number, since it uses as much as digits as its factorization.

145105532123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19002996.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 145105532123 in words is "one hundred forty-five billion, one hundred five million, five hundred thirty-two thousand, one hundred twenty-three".