12631616 has 14 divisors (see below), whose sum is σ = 25065990. Its totient is φ = 6315776.

The previous prime is 12631609. The next prime is 12631621. The reversal of 12631616 is 61613621.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 409600 = 3496^2 + 640^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98621 + ... + 98748.

Almost surely, 2^12631616 is an apocalyptic number.

12631616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12631616 is a deficient number, since it is larger than the sum of its proper divisors (12434374).

12631616 is an equidigital number, since it uses as much as digits as its factorization.

12631616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197381 (or 197371 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 12631616 is about 3554.0984792209. The cubic root of 12631616 is about 232.8911425776.

The spelling of 12631616 in words is "twelve million, six hundred thirty-one thousand, six hundred sixteen".