80136578880 has 308 divisors, whose sum is σ = 286303719492. Its totient is φ = 21364715520.

The previous prime is 80136578803. The next prime is 80136578891. The reversal of 80136578880 is 8887563108.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59997563136 + 20139015744 = 244944^2 + 141912^2 .

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

It is a congruent number.

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 43 ways as a sum of consecutive naturals, for example, 18893560 + ... + 18897800.

Almost surely, 2^80136578880 is an apocalyptic number.

80136578880 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 80136578880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143151859746).

80136578880 is an abundant number, since it is smaller than the sum of its proper divisors (206167140612).

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

80136578880 is an frugal number, since it uses more digits than its factorization.

80136578880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288 (or 4251 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 80136578880 in words is "eighty billion, one hundred thirty-six million, five hundred seventy-eight thousand, eight hundred eighty".