80565143400 has 864 divisors, whose sum is σ = 329476680000. Its totient is φ = 18312013440.

The previous prime is 80565143381. The next prime is 80565143401. The reversal of 80565143400 is 434156508.

It is a happy number.

80565143400 is a `hidden beast` number, since 80 + 565 + 14 + 3 + 4 + 0 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (80565143401) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 450084511 + ... + 450084689.

It is an arithmetic number, because the mean of its divisors is an integer number (381338750).

Almost surely, 2^80565143400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80565143400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164738340000).

80565143400 is an abundant number, since it is smaller than the sum of its proper divisors (248911536600).

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

80565143400 is an equidigital number, since it uses as much as digits as its factorization.

80565143400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 80565143400 its reverse (434156508), we get a palindrome (80999299908).

The spelling of 80565143400 in words is "eighty billion, five hundred sixty-five million, one hundred forty-three thousand, four hundred".