16648631 has 4 divisors (see below), whose sum is σ = 17098632. Its totient is φ = 16198632.

The previous prime is 16648613. The next prime is 16648633. The reversal of 16648631 is 13684661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16648631 is a prime.

It is a super-2 number, since 2×16648631² = 554353828348322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16648591 and 16648600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16648633) 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, 224945 + ... + 225018.

It is an arithmetic number, because the mean of its divisors is an integer number (4274658).

Almost surely, 2^16648631 is an apocalyptic number.

16648631 is a deficient number, since it is larger than the sum of its proper divisors (450001).

16648631 is an equidigital number, since it uses as much as digits as its factorization.

16648631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450000.

The product of its digits is 20736, while the sum is 35.

The square root of 16648631 is about 4080.2733977027. The cubic root of 16648631 is about 255.3443048654.

The spelling of 16648631 in words is "sixteen million, six hundred forty-eight thousand, six hundred thirty-one".