5563518921 has 45 divisors (see below), whose sum is σ = 8584032301. Its totient is φ = 3472267128.

The previous prime is 5563518913. The next prime is 5563518931. The reversal of 5563518921 is 1298153655.

The square root of 5563518921 is 74589.

It is a perfect power (a square), and thus also a powerful number.

5563518921 is a `hidden beast` number, since 5 + 5 + 635 + 1 + 8 + 9 + 2 + 1 = 666.

It is not a de Polignac number, because 5563518921 - 2³ = 5563518913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5563518931) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 118372720 + ... + 118372766.

Almost surely, 2^5563518921 is an apocalyptic number.

5563518921 is the 74589-th square number.

5563518921 is the 37295-th centered octagonal number.

It is an amenable number.

5563518921 is a deficient number, since it is larger than the sum of its proper divisors (3020513380).

5563518921 is an frugal number, since it uses more digits than its factorization.

5563518921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 73 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The cubic root of 5563518921 is about 1771.9434451468.

The spelling of 5563518921 in words is "five billion, five hundred sixty-three million, five hundred eighteen thousand, nine hundred twenty-one".