80655985536 has 128 divisors (see below), whose sum is σ = 244948838400. Its totient is φ = 23035127808.

The previous prime is 80655985523. The next prime is 80655985541. The reversal of 80655985536 is 63558955608.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 80655985536.

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 15 ways as a sum of consecutive naturals, for example, 9024526 + ... + 9033458.

It is an arithmetic number, because the mean of its divisors is an integer number (1913662800).

Almost surely, 2^80655985536 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 80655985536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122474419200).

80655985536 is an abundant number, since it is smaller than the sum of its proper divisors (164292852864).

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

80655985536 is a wasteful number, since it uses less digits than its factorization.

80655985536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12316 (or 12304 counting only the distinct ones).

The product of its (nonzero) digits is 38880000, while the sum is 60.

The spelling of 80655985536 in words is "eighty billion, six hundred fifty-five million, nine hundred eighty-five thousand, five hundred thirty-six".