16426656523 has 4 divisors (see below), whose sum is σ = 16427294928. Its totient is φ = 16426018120.

The previous prime is 16426656517. The next prime is 16426656529. The reversal of 16426656523 is 32565662461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32565662461 = 6599 ⋅4934939.

It is an interprime number because it is at equal distance from previous prime (16426656517) and next prime (16426656529).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16426656523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16426656529) 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, 278911 + ... + 332632.

It is an arithmetic number, because the mean of its divisors is an integer number (4106823732).

Almost surely, 2^16426656523 is an apocalyptic number.

16426656523 is a deficient number, since it is larger than the sum of its proper divisors (638405).

16426656523 is an equidigital number, since it uses as much as digits as its factorization.

16426656523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638404.

The product of its digits is 1555200, while the sum is 46.

The spelling of 16426656523 in words is "sixteen billion, four hundred twenty-six million, six hundred fifty-six thousand, five hundred twenty-three".