80243736520 has 16 divisors (see below), whose sum is σ = 180548407260. Its totient is φ = 32097494592.

The previous prime is 80243736473. The next prime is 80243736533. The reversal of 80243736520 is 2563734208.

It can be written as a sum of positive squares in 2 ways, for example, as 79820940676 + 422795844 = 282526^2 + 20562^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 2006093413 = 80243736520 / (8 + 0 + 2 + 4 + 3 + 7 + 3 + 6 + 5 + 2 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1003046667 + ... + 1003046746.

Almost surely, 2^80243736520 is an apocalyptic number.

It is an amenable number.

80243736520 is an abundant number, since it is smaller than the sum of its proper divisors (100304670740).

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

80243736520 is a wasteful number, since it uses less digits than its factorization.

80243736520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006093424 (or 2006093420 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 80243736520 in words is "eighty billion, two hundred forty-three million, seven hundred thirty-six thousand, five hundred twenty".