16256323872 has 72 divisors (see below), whose sum is σ = 46283816124. Its totient is φ = 5412340224.

The previous prime is 16256323841. The next prime is 16256323873. The reversal of 16256323872 is 27832365261.

16256323872 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 632 + 3 + 8 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11958734736 + 4297589136 = 109356^2 + 65556^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (16256323873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212578 + ... + 278750.

Almost surely, 2^16256323872 is an apocalyptic number.

16256323872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16256323872 is an abundant number, since it is smaller than the sum of its proper divisors (30027492252).

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

16256323872 is a wasteful number, since it uses less digits than its factorization.

16256323872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67042 (or 67031 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 16256323872 in words is "sixteen billion, two hundred fifty-six million, three hundred twenty-three thousand, eight hundred seventy-two".