16115325408 has 768 divisors, whose sum is σ = 60963840000. Its totient is φ = 4113027072.

The previous prime is 16115325367. The next prime is 16115325409. The reversal of 16115325408 is 80452351161.

16115325408 is a `hidden beast` number, since 1 + 61 + 1 + 53 + 2 + 540 + 8 = 666.

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 (16115325409) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 181071028 + ... + 181071116.

It is an arithmetic number, because the mean of its divisors is an integer number (79380000).

Almost surely, 2^16115325408 is an apocalyptic number.

16115325408 is a gapful number since it is divisible by the number (18) 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 16115325408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30481920000).

16115325408 is an abundant number, since it is smaller than the sum of its proper divisors (44848514592).

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

16115325408 is a wasteful number, since it uses less digits than its factorization.

16115325408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

Adding to 16115325408 its reverse (80452351161), we get a palindrome (96567676569).

The spelling of 16115325408 in words is "sixteen billion, one hundred fifteen million, three hundred twenty-five thousand, four hundred eight".