16799111280 has 240 divisors, whose sum is σ = 65081263104. Its totient is φ = 3803788800.

The previous prime is 16799111279. The next prime is 16799111281. The reversal of 16799111280 is 8211199761.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16799111279) and next prime (16799111281).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16799111281) 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, 523705 + ... + 554855.

Almost surely, 2^16799111280 is an apocalyptic number.

16799111280 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 16799111280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32540631552).

16799111280 is an abundant number, since it is smaller than the sum of its proper divisors (48282151824).

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

16799111280 is a wasteful number, since it uses less digits than its factorization.

16799111280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31284 (or 31275 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 45.

The spelling of 16799111280 in words is "sixteen billion, seven hundred ninety-nine million, one hundred eleven thousand, two hundred eighty".