1563618945 has 64 divisors (see below), whose sum is σ = 3034437120. Its totient is φ = 671182848.

The previous prime is 1563618941. The next prime is 1563618967. The reversal of 1563618945 is 5498163651.

1563618945 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1563618945 - 2² = 1563618941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1563618894 and 1563618903.

It is not an unprimeable number, because it can be changed into a prime (1563618941) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1093491 + ... + 1094919.

It is an arithmetic number, because the mean of its divisors is an integer number (47413080).

Almost surely, 2^1563618945 is an apocalyptic number.

1563618945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1563618945 is a deficient number, since it is larger than the sum of its proper divisors (1470818175).

1563618945 is a wasteful number, since it uses less digits than its factorization.

1563618945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074.

The product of its digits is 777600, while the sum is 48.

The square root of 1563618945 is about 39542.6218781709. The cubic root of 1563618945 is about 1160.6741387144.

The spelling of 1563618945 in words is "one billion, five hundred sixty-three million, six hundred eighteen thousand, nine hundred forty-five".