16426317715665 has 96 divisors (see below), whose sum is σ = 31113750084480. Its totient is φ = 7350941199360.

The previous prime is 16426317715663. The next prime is 16426317715721. The reversal of 16426317715665 is 56651771362461.

It is not a de Polignac number, because 16426317715665 - 2¹ = 16426317715663 is a prime.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16426317715599 and 16426317715608.

It is not an unprimeable number, because it can be changed into a prime (16426317715663) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 310554541 + ... + 310607429.

It is an arithmetic number, because the mean of its divisors is an integer number (324101563380).

Almost surely, 2^{16426317715665} is an apocalyptic number.

16426317715665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16426317715665 is a deficient number, since it is larger than the sum of its proper divisors (14687432368815).

16426317715665 is a wasteful number, since it uses less digits than its factorization.

16426317715665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66095 (or 66084 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 60.

The spelling of 16426317715665 in words is "sixteen trillion, four hundred twenty-six billion, three hundred seventeen million, seven hundred fifteen thousand, six hundred sixty-five".