80778664536 has 16 divisors (see below), whose sum is σ = 201946661400. Its totient is φ = 26926221504.

The previous prime is 80778664529. The next prime is 80778664613. The reversal of 80778664536 is 63546687708.

It is a self number, because there is not a number n which added to its sum of digits gives 80778664536.

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 3 ways as a sum of consecutive naturals, for example, 1682888821 + ... + 1682888868.

Almost surely, 2^80778664536 is an apocalyptic number.

It is an amenable number.

80778664536 is an abundant number, since it is smaller than the sum of its proper divisors (121167996864).

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

80778664536 is a wasteful number, since it uses less digits than its factorization.

80778664536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365777698 (or 3365777694 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 80778664536 in words is "eighty billion, seven hundred seventy-eight million, six hundred sixty-four thousand, five hundred thirty-six".