16456521312 has 288 divisors, whose sum is σ = 58639037184. Its totient is φ = 4252953600.

The previous prime is 16456521311. The next prime is 16456521317. The reversal of 16456521312 is 21312565461.

16456521312 is a `hidden beast` number, since 1 + 64 + 565 + 2 + 1 + 31 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16456521311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4677378 + ... + 4680894.

It is an arithmetic number, because the mean of its divisors is an integer number (203607768).

Almost surely, 2^16456521312 is an apocalyptic number.

16456521312 is a gapful number since it is divisible by the number (12) 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 16456521312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29319518592).

16456521312 is an abundant number, since it is smaller than the sum of its proper divisors (42182515872).

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

16456521312 is a wasteful number, since it uses less digits than its factorization.

16456521312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762 (or 3751 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 16456521312 in words is "sixteen billion, four hundred fifty-six million, five hundred twenty-one thousand, three hundred twelve".