80805577500 has 90 divisors (see below), whose sum is σ = 255241546560. Its totient is φ = 21548148000.

The previous prime is 80805577477. The next prime is 80805577519. The reversal of 80805577500 is 577550808.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (90).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1773180 + ... + 1818179.

It is an arithmetic number, because the mean of its divisors is an integer number (2836017184).

Almost surely, 2^80805577500 is an apocalyptic number.

It is an amenable number.

80805577500 is an abundant number, since it is smaller than the sum of its proper divisors (174435969060).

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

80805577500 is a wasteful number, since it uses less digits than its factorization.

80805577500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591389 (or 3591369 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 45.

The spelling of 80805577500 in words is "eighty billion, eight hundred five million, five hundred seventy-seven thousand, five hundred".