16499878536960 has 3456 divisors, whose sum is σ = 78324693350400. Its totient is φ = 3291294892032.

The previous prime is 16499878536877. The next prime is 16499878536991. The reversal of 16499878536960 is 6963587899461.

16499878536960 is a `hidden beast` number, since 1 + 6 + 4 + 9 + 9 + 8 + 78 + 536 + 9 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3456).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 16499878536960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 33880653837 + ... + 33880654323.

Almost surely, 2^{16499878536960} is an apocalyptic number.

16499878536960 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 16499878536960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39162346675200).

16499878536960 is an abundant number, since it is smaller than the sum of its proper divisors (61824814813440).

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

16499878536960 is an equidigital number, since it uses as much as digits as its factorization.

16499878536960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 4232632320, while the sum is 81.

The spelling of 16499878536960 in words is "sixteen trillion, four hundred ninety-nine billion, eight hundred seventy-eight million, five hundred thirty-six thousand, nine hundred sixty".