145545563 has 4 divisors (see below), whose sum is σ = 147299208. Its totient is φ = 143791920.

The previous prime is 145545509. The next prime is 145545581. The reversal of 145545563 is 365545541.

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 145545563 - 2¹⁸ = 145283419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145545593) 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, 876698 + ... + 876863.

It is an arithmetic number, because the mean of its divisors is an integer number (36824802).

Almost surely, 2^145545563 is an apocalyptic number.

145545563 is a deficient number, since it is larger than the sum of its proper divisors (1753645).

145545563 is an equidigital number, since it uses as much as digits as its factorization.

145545563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753644.

The product of its digits is 180000, while the sum is 38.

The square root of 145545563 is about 12064.2265810950. The cubic root of 145545563 is about 526.0168506989.

The spelling of 145545563 in words is "one hundred forty-five million, five hundred forty-five thousand, five hundred sixty-three".