16543091400 has 192 divisors, whose sum is σ = 57002512320. Its totient is φ = 3934694400.

The previous prime is 16543091387. The next prime is 16543091401. The reversal of 16543091400 is 419034561.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (16543091401) 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, 326154 + ... + 373446.

It is an arithmetic number, because the mean of its divisors is an integer number (296888085).

Almost surely, 2^16543091400 is an apocalyptic number.

16543091400 is a gapful number since it is divisible by the number (10) 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 16543091400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28501256160).

16543091400 is an abundant number, since it is smaller than the sum of its proper divisors (40459420920).

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

16543091400 is a wasteful number, since it uses less digits than its factorization.

16543091400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47376 (or 47367 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 16543091400 in words is "sixteen billion, five hundred forty-three million, ninety-one thousand, four hundred".