145561563 has 16 divisors (see below), whose sum is σ = 246453760. Its totient is φ = 83177928.

The previous prime is 145561513. The next prime is 145561571. The reversal of 145561563 is 365165541.

145561563 is a `hidden beast` number, since 1 + 45 + 56 + 1 + 563 = 666.

It is not a de Polignac number, because 145561563 - 2⁸ = 145561307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145561513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384895 + ... + 385272.

It is an arithmetic number, because the mean of its divisors is an integer number (15403360).

Almost surely, 2^145561563 is an apocalyptic number.

145561563 is a deficient number, since it is larger than the sum of its proper divisors (100892197).

145561563 is an equidigital number, since it uses as much as digits as its factorization.

145561563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770183 (or 770177 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 145561563 is about 12064.8896803908. The cubic root of 145561563 is about 526.0361252158.

The spelling of 145561563 in words is "one hundred forty-five million, five hundred sixty-one thousand, five hundred sixty-three".