16731242208 has 72 divisors (see below), whose sum is σ = 48686005368. Its totient is φ = 5447377152.

The previous prime is 16731242183. The next prime is 16731242263. The reversal of 16731242208 is 80224213761.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663135 + ... + 687902.

It is an arithmetic number, because the mean of its divisors is an integer number (676194519).

Almost surely, 2^16731242208 is an apocalyptic number.

16731242208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16731242208 is an abundant number, since it is smaller than the sum of its proper divisors (31954763160).

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

16731242208 is a wasteful number, since it uses less digits than its factorization.

16731242208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351096 (or 1351085 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

Adding to 16731242208 its reverse (80224213761), we get a palindrome (96955455969).

The spelling of 16731242208 in words is "sixteen billion, seven hundred thirty-one million, two hundred forty-two thousand, two hundred eight".