16115786280 has 384 divisors, whose sum is σ = 60652800000. Its totient is φ = 3672430080.

The previous prime is 16115786251. The next prime is 16115786287. The reversal of 16115786280 is 8268751161.

16115786280 is a `hidden beast` number, since 1 + 6 + 1 + 15 + 7 + 8 + 628 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (16115786287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5372221 + ... + 5375219.

It is an arithmetic number, because the mean of its divisors is an integer number (157950000).

Almost surely, 2^16115786280 is an apocalyptic number.

16115786280 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 16115786280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30326400000).

16115786280 is an abundant number, since it is smaller than the sum of its proper divisors (44537013720).

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

16115786280 is a wasteful number, since it uses less digits than its factorization.

16115786280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 16115786280 in words is "sixteen billion, one hundred fifteen million, seven hundred eighty-six thousand, two hundred eighty".