1563988538 has 16 divisors (see below), whose sum is σ = 2682129024. Its totient is φ = 670029360.

The previous prime is 1563988537. The next prime is 1563988541. The reversal of 1563988538 is 8358893651.

It is not an unprimeable number, because it can be changed into a prime (1563988537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20531 + ... + 59577.

It is an arithmetic number, because the mean of its divisors is an integer number (167633064).

Almost surely, 2^1563988538 is an apocalyptic number.

1563988538 is a deficient number, since it is larger than the sum of its proper divisors (1118140486).

1563988538 is a wasteful number, since it uses less digits than its factorization.

1563988538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41917.

The product of its digits is 6220800, while the sum is 56.

The square root of 1563988538 is about 39547.2949517410. The cubic root of 1563988538 is about 1160.7655811219.

The spelling of 1563988538 in words is "one billion, five hundred sixty-three million, nine hundred eighty-eight thousand, five hundred thirty-eight".