16616610631 has 8 divisors (see below), whose sum is σ = 16640280800. Its totient is φ = 16592960160.

The previous prime is 16616610589. The next prime is 16616610641. The reversal of 16616610631 is 13601661661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16616610631 - 2²⁵ = 16583056199 is a prime.

It is a super-2 number, since 2×16616610631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616610641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2484550 + ... + 2491228.

It is an arithmetic number, because the mean of its divisors is an integer number (2080035100).

Almost surely, 2^16616610631 is an apocalyptic number.

16616610631 is a deficient number, since it is larger than the sum of its proper divisors (23670169).

16616610631 is a wasteful number, since it uses less digits than its factorization.

16616610631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9849.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 16616610631 in words is "sixteen billion, six hundred sixteen million, six hundred ten thousand, six hundred thirty-one".