16535231032320 has 6336 divisors, whose sum is σ = 86306825299968. Its totient is φ = 2942985830400.

The previous prime is 16535231032283. The next prime is 16535231032343. The reversal of 16535231032320 is 2323013253561.

16535231032320 is a `hidden beast` number, since 1 + 6 + 5 + 3 + 523 + 103 + 2 + 3 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (6336).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 232890577885 + ... + 232890577955.

Almost surely, 2^{16535231032320} is an apocalyptic number.

16535231032320 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 16535231032320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43153412649984).

16535231032320 is an abundant number, since it is smaller than the sum of its proper divisors (69771594267648).

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

16535231032320 is a wasteful number, since it uses less digits than its factorization.

16535231032320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

Adding to 16535231032320 its reverse (2323013253561), we get a palindrome (18858244285881).

The spelling of 16535231032320 in words is "sixteen trillion, five hundred thirty-five billion, two hundred thirty-one million, thirty-two thousand, three hundred twenty".