1663293616 has 20 divisors (see below), whose sum is σ = 3228030000. Its totient is φ = 830253632.

The previous prime is 1663293613. The next prime is 1663293631. The reversal of 1663293616 is 6163923661.

It is not an unprimeable number, because it can be changed into a prime (1663293613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77191 + ... + 96358.

It is an arithmetic number, because the mean of its divisors is an integer number (161401500).

Almost surely, 2^1663293616 is an apocalyptic number.

1663293616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1663293616 is a deficient number, since it is larger than the sum of its proper divisors (1564736384).

1663293616 is a wasteful number, since it uses less digits than its factorization.

1663293616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174156 (or 174150 counting only the distinct ones).

The product of its digits is 209952, while the sum is 43.

The square root of 1663293616 is about 40783.4968584108. The cubic root of 1663293616 is about 1184.8307225544.

The spelling of 1663293616 in words is "one billion, six hundred sixty-three million, two hundred ninety-three thousand, six hundred sixteen".