16318277521920 has 4480 divisors, whose sum is σ = 75121766184960. Its totient is φ = 3342391050240.

The previous prime is 16318277521853. The next prime is 16318277521957. The reversal of 16318277521920 is 2912577281361.

16318277521920 is a `hidden beast` number, since 1 + 6 + 3 + 1 + 8 + 27 + 7 + 521 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 447 ways as a sum of consecutive naturals, for example, 152507266507 + ... + 152507266613.

Almost surely, 2^{16318277521920} is an apocalyptic number.

16318277521920 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 16318277521920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37560883092480).

16318277521920 is an abundant number, since it is smaller than the sum of its proper divisors (58803488663040).

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

16318277521920 is a wasteful number, since it uses less digits than its factorization.

16318277521920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 16318277521920 in words is "sixteen trillion, three hundred eighteen billion, two hundred seventy-seven million, five hundred twenty-one thousand, nine hundred twenty".