80858728788 has 12 divisors (see below), whose sum is σ = 188670367200. Its totient is φ = 26952909592.

The previous prime is 80858728781. The next prime is 80858728807. The reversal of 80858728788 is 88782785808.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×80858728788² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80858728781) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3369113688 + ... + 3369113711.

It is an arithmetic number, because the mean of its divisors is an integer number (15722530600).

Almost surely, 2^80858728788 is an apocalyptic number.

It is an amenable number.

80858728788 is an abundant number, since it is smaller than the sum of its proper divisors (107811638412).

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

80858728788 is a wasteful number, since it uses less digits than its factorization.

80858728788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738227406 (or 6738227404 counting only the distinct ones).

The product of its (nonzero) digits is 128450560, while the sum is 69.

The spelling of 80858728788 in words is "eighty billion, eight hundred fifty-eight million, seven hundred twenty-eight thousand, seven hundred eighty-eight".