1563356998 has 16 divisors (see below), whose sum is σ = 2772456480. Its totient is φ = 646906176.

The previous prime is 1563356987. The next prime is 1563356999. The reversal of 1563356998 is 8996533651.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563356999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1924911 + ... + 1925722.

It is an arithmetic number, because the mean of its divisors is an integer number (173278530).

Almost surely, 2^1563356998 is an apocalyptic number.

1563356998 is a deficient number, since it is larger than the sum of its proper divisors (1209099482).

1563356998 is a wasteful number, since it uses less digits than its factorization.

1563356998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850671.

The product of its digits is 5248800, while the sum is 55.

The square root of 1563356998 is about 39539.3095286197. The cubic root of 1563356998 is about 1160.6093206867.

The spelling of 1563356998 in words is "one billion, five hundred sixty-three million, three hundred fifty-six thousand, nine hundred ninety-eight".