80818263438 has 32 divisors (see below), whose sum is σ = 176531944320. Its totient is φ = 24462440160.

The previous prime is 80818263419. The next prime is 80818263439. The reversal of 80818263438 is 83436281808.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80818263439) 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 15 ways as a sum of consecutive naturals, for example, 640248 + ... + 756011.

It is an arithmetic number, because the mean of its divisors is an integer number (5516623260).

Almost surely, 2^80818263438 is an apocalyptic number.

80818263438 is an abundant number, since it is smaller than the sum of its proper divisors (95713680882).

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

80818263438 is a wasteful number, since it uses less digits than its factorization.

80818263438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397152.

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 80818263438 in words is "eighty billion, eight hundred eighteen million, two hundred sixty-three thousand, four hundred thirty-eight".