80378015056 has 20 divisors (see below), whose sum is σ = 155746936692. Its totient is φ = 40185257216.

The previous prime is 80378015021. The next prime is 80378015059. The reversal of 80378015056 is 65051087308.

It can be written as a sum of positive squares in 2 ways, for example, as 67964490000 + 12413525056 = 260700^2 + 111416^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80378015059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53341 + ... + 404476.

Almost surely, 2^80378015056 is an apocalyptic number.

It is an amenable number.

80378015056 is a deficient number, since it is larger than the sum of its proper divisors (75368921636).

80378015056 is a wasteful number, since it uses less digits than its factorization.

80378015056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468798 (or 468792 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 80378015056 in words is "eighty billion, three hundred seventy-eight million, fifteen thousand, fifty-six".