16426523556 has 81 divisors (see below), whose sum is σ = 42641894659. Its totient is φ = 5331705600.

The previous prime is 16426523551. The next prime is 16426523557. The reversal of 16426523556 is 65532562461.

The square root of 16426523556 is 128166.

It is a perfect power (a square), and thus also a powerful number.

16426523556 is a `hidden beast` number, since 1 + 6 + 42 + 6 + 52 + 3 + 556 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8196405156 + 8230118400 = 90534^2 + 90720^2 .

It is a super-2 number, since 2×16426523556² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16426523551) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31528576 + ... + 31529096.

Almost surely, 2^16426523556 is an apocalyptic number.

16426523556 is the 128166-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16426523556

16426523556 is an abundant number, since it is smaller than the sum of its proper divisors (26215371103).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16426523556 is an equidigital number, since it uses as much as digits as its factorization.

16426523556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 567 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 16426523556 in words is "sixteen billion, four hundred twenty-six million, five hundred twenty-three thousand, five hundred fifty-six".