1663312200 has 96 divisors (see below), whose sum is σ = 5625041760. Its totient is φ = 403225600.

The previous prime is 1663312199. The next prime is 1663312241. The reversal of 1663312200 is 22133661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119409 + ... + 132608.

It is an arithmetic number, because the mean of its divisors is an integer number (58594185).

Almost surely, 2^1663312200 is an apocalyptic number.

1663312200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663312200 is an abundant number, since it is smaller than the sum of its proper divisors (3961729560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663312200 is a wasteful number, since it uses less digits than its factorization.

1663312200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252047 (or 252038 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1663312200 is about 40783.7246950300. The cubic root of 1663312200 is about 1184.8351352474.

Adding to 1663312200 its reverse (22133661), we get a palindrome (1685445861).

The spelling of 1663312200 in words is "one billion, six hundred sixty-three million, three hundred twelve thousand, two hundred".