16117565650 has 12 divisors (see below), whose sum is σ = 29978672202. Its totient is φ = 6447026240.

The previous prime is 16117565647. The next prime is 16117565677. The reversal of 16117565650 is 5656571161.

It can be written as a sum of positive squares in 3 ways, for example, as 12429797121 + 3687768529 = 111489^2 + 60727^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16117565597 and 16117565606.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161175607 + ... + 161175706.

Almost surely, 2^16117565650 is an apocalyptic number.

16117565650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16117565650 is a deficient number, since it is larger than the sum of its proper divisors (13861106552).

16117565650 is a wasteful number, since it uses less digits than its factorization.

16117565650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322351325 (or 322351320 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 16117565650 in words is "sixteen billion, one hundred seventeen million, five hundred sixty-five thousand, six hundred fifty".