16311376656 has 135 divisors (see below), whose sum is σ = 47406762741. Its totient is φ = 5235334272.

The previous prime is 16311376621. The next prime is 16311376667. The reversal of 16311376656 is 65667311361.

It is a happy number.

The square root of 16311376656 is 127716.

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

16311376656 is a `hidden beast` number, since 1 + 631 + 1 + 3 + 7 + 6 + 6 + 5 + 6 = 666.

16311376656 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in only one way, i.e., 8553290256 + 7758086400 = 92484^2 + 88080^2 .

It is a super-2 number, since 2×16311376656² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 44444985 + ... + 44445351.

Almost surely, 2^16311376656 is an apocalyptic number.

16311376656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16311376656 is the 127716-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16311376656

16311376656 is an abundant number, since it is smaller than the sum of its proper divisors (31095386085).

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

16311376656 is an equidigital number, since it uses as much as digits as its factorization.

16311376656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 401 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The spelling of 16311376656 in words is "sixteen billion, three hundred eleven million, three hundred seventy-six thousand, six hundred fifty-six".