80505583278 has 16 divisors (see below), whose sum is σ = 169485438720. Its totient is φ = 25422815736.

The previous prime is 80505583241. The next prime is 80505583381. The reversal of 80505583278 is 87238550508.

It is a happy number.

It is a super-2 number, since 2×80505583278² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80505583278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353094550 + ... + 353094777.

It is an arithmetic number, because the mean of its divisors is an integer number (10592839920).

Almost surely, 2^80505583278 is an apocalyptic number.

80505583278 is an abundant number, since it is smaller than the sum of its proper divisors (88979855442).

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

80505583278 is a wasteful number, since it uses less digits than its factorization.

80505583278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706189351.

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 80505583278 in words is "eighty billion, five hundred five million, five hundred eighty-three thousand, two hundred seventy-eight".