15955325568 has 448 divisors, whose sum is σ = 58686230400. Its totient is φ = 4205758464.

The previous prime is 15955325567. The next prime is 15955325593. The reversal of 15955325568 is 86552355951.

It is a happy number.

15955325568 is a `hidden beast` number, since 1 + 5 + 9 + 5 + 53 + 25 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

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

It is not an unprimeable number, because it can be changed into a prime (15955325567) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8490453 + ... + 8492331.

It is an arithmetic number, because the mean of its divisors is an integer number (130996050).

Almost surely, 2^15955325568 is an apocalyptic number.

15955325568 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 15955325568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29343115200).

15955325568 is an abundant number, since it is smaller than the sum of its proper divisors (42730904832).

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

15955325568 is an equidigital number, since it uses as much as digits as its factorization.

15955325568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931 (or 1904 counting only the distinct ones).

The product of its digits is 8100000, while the sum is 54.

The spelling of 15955325568 in words is "fifteen billion, nine hundred fifty-five million, three hundred twenty-five thousand, five hundred sixty-eight".