8155944000 has 448 divisors, whose sum is σ = 30462931200. Its totient is φ = 2135808000.

The previous prime is 8155943989. The next prime is 8155944029. The reversal of 8155944000 is 4495518.

It is a super-2 number, since 2×8155944000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 13175691 + ... + 13176309.

Almost surely, 2^8155944000 is an apocalyptic number.

8155944000 is a gapful number since it is divisible by the number (80) 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 8155944000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15231465600).

8155944000 is an abundant number, since it is smaller than the sum of its proper divisors (22306987200).

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

8155944000 is a wasteful number, since it uses less digits than its factorization.

8155944000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 690 counting only the distinct ones).

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

The square root of 8155944000 is about 90310.2651972632. The cubic root of 8155944000 is about 2012.9117967043.

The spelling of 8155944000 in words is "eight billion, one hundred fifty-five million, nine hundred forty-four thousand".