16543143972 has 192 divisors, whose sum is σ = 48305376000. Its totient is φ = 4865163264.

The previous prime is 16543143961. The next prime is 16543144001. The reversal of 16543143972 is 27934134561.

16543143972 is a `hidden beast` number, since 1 + 6 + 543 + 1 + 4 + 39 + 72 = 666.

It is a super-2 number, since 2×16543143972² (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 63 ways as a sum of consecutive naturals, for example, 3381304 + ... + 3386192.

It is an arithmetic number, because the mean of its divisors is an integer number (251590500).

Almost surely, 2^16543143972 is an apocalyptic number.

16543143972 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 16543143972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24152688000).

16543143972 is an abundant number, since it is smaller than the sum of its proper divisors (31762232028).

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

16543143972 is a wasteful number, since it uses less digits than its factorization.

16543143972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035 (or 5027 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 16543143972 in words is "sixteen billion, five hundred forty-three million, one hundred forty-three thousand, nine hundred seventy-two".