80881139520 has 896 divisors, whose sum is σ = 314304883200. Its totient is φ = 19508428800.

The previous prime is 80881139483. The next prime is 80881139531. The reversal of 80881139520 is 2593118808.

It is a happy number.

80881139520 is a `hidden beast` number, since 8 + 0 + 8 + 8 + 113 + 9 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 410564062 + ... + 410564258.

It is an arithmetic number, because the mean of its divisors is an integer number (350786700).

Almost surely, 2^80881139520 is an apocalyptic number.

80881139520 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 80881139520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157152441600).

80881139520 is an abundant number, since it is smaller than the sum of its proper divisors (233423743680).

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

80881139520 is a wasteful number, since it uses less digits than its factorization.

80881139520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 80881139520 in words is "eighty billion, eight hundred eighty-one million, one hundred thirty-nine thousand, five hundred twenty".