80805061861920 has 1920 divisors, whose sum is σ = 322039826583552. Its totient is φ = 18913819852800.

The previous prime is 80805061861913. The next prime is 80805061861981. The reversal of 80805061861920 is 2916816050808.

It is a happy number.

80805061861920 is a `hidden beast` number, since 8 + 0 + 8 + 0 + 5 + 0 + 6 + 18 + 619 + 2 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 263208670407 + ... + 263208670713.

Almost surely, 2^{80805061861920} is an apocalyptic number.

80805061861920 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 80805061861920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161019913291776).

80805061861920 is an abundant number, since it is smaller than the sum of its proper divisors (241234764721632).

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

80805061861920 is a wasteful number, since it uses less digits than its factorization.

80805061861920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 80805061861920 in words is "eighty trillion, eight hundred five billion, sixty-one million, eight hundred sixty-one thousand, nine hundred twenty".