16343726257 has 4 divisors (see below), whose sum is σ = 16344529920. Its totient is φ = 16342922596.

The previous prime is 16343726249. The next prime is 16343726281. The reversal of 16343726257 is 75262734361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75262734361 = 113 ⋅666041897.

It is a cyclic number.

It is not a de Polignac number, because 16343726257 - 2³ = 16343726249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16343726227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370513 + ... + 412270.

It is an arithmetic number, because the mean of its divisors is an integer number (4086132480).

Almost surely, 2^16343726257 is an apocalyptic number.

It is an amenable number.

16343726257 is a deficient number, since it is larger than the sum of its proper divisors (803663).

16343726257 is an equidigital number, since it uses as much as digits as its factorization.

16343726257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803662.

The product of its digits is 1270080, while the sum is 46.

The spelling of 16343726257 in words is "sixteen billion, three hundred forty-three million, seven hundred twenty-six thousand, two hundred fifty-seven".