16520486400 has 360 divisors, whose sum is σ = 64501958664. Its totient is φ = 4004659200.

The previous prime is 16520486387. The next prime is 16520486401. The reversal of 16520486400 is 468402561.

16520486400 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 0 + 4 + 8 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

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 (16520486401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1260682 + ... + 1273718.

Almost surely, 2^16520486400 is an apocalyptic number.

16520486400 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 16520486400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32250979332).

16520486400 is an abundant number, since it is smaller than the sum of its proper divisors (47981472264).

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

16520486400 is a wasteful number, since it uses less digits than its factorization.

16520486400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13082 (or 13058 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 16520486400 its reverse (468402561), we get a palindrome (16988888961).

The spelling of 16520486400 in words is "sixteen billion, five hundred twenty million, four hundred eighty-six thousand, four hundred".