16181254656 has 400 divisors, whose sum is σ = 55732057920. Its totient is φ = 4578508800.

The previous prime is 16181254651. The next prime is 16181254669. The reversal of 16181254656 is 65645218161.

16181254656 is a `hidden beast` number, since 1 + 6 + 181 + 2 + 5 + 465 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (16181254651) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40352056 + ... + 40352456.

Almost surely, 2^16181254656 is an apocalyptic number.

16181254656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16181254656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27866028960).

16181254656 is an abundant number, since it is smaller than the sum of its proper divisors (39550803264).

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

16181254656 is an equidigital number, since it uses as much as digits as its factorization.

16181254656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 552 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 16181254656 in words is "sixteen billion, one hundred eighty-one million, two hundred fifty-four thousand, six hundred fifty-six".