16426217255797 has 4 divisors (see below), whose sum is σ = 16435919689420. Its totient is φ = 16416514822176.

The previous prime is 16426217255779. The next prime is 16426217255821. The reversal of 16426217255797 is 79755271262461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2703571216516 + 13722646039281 = 1644254^2 + 3704409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16426217255797 is a prime.

It is a super-2 number, since 2×16426217255797² (a number of 27 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 (16426217855797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4851214272 + ... + 4851217657.

It is an arithmetic number, because the mean of its divisors is an integer number (4108979922355).

Almost surely, 2^{16426217255797} is an apocalyptic number.

It is an amenable number.

16426217255797 is a deficient number, since it is larger than the sum of its proper divisors (9702433623).

16426217255797 is an equidigital number, since it uses as much as digits as its factorization.

16426217255797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9702433622.

The product of its digits is 88905600, while the sum is 64.

The spelling of 16426217255797 in words is "sixteen trillion, four hundred twenty-six billion, two hundred seventeen million, two hundred fifty-five thousand, seven hundred ninety-seven".