80309899538 has 18 divisors (see below), whose sum is σ = 132419045493. Its totient is φ = 36502495920.

The previous prime is 80309899513. The next prime is 80309899547. The reversal of 80309899538 is 83599890308.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73838823289 + 6471076249 = 271733^2 + 80443^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=200387.

It is a super-2 number, since 2×80309899538² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4399406 + ... + 4417622.

Almost surely, 2^80309899538 is an apocalyptic number.

80309899538 is a deficient number, since it is larger than the sum of its proper divisors (52109145955).

80309899538 is an frugal number, since it uses more digits than its factorization.

80309899538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36458 (or 18230 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 62.

The spelling of 80309899538 in words is "eighty billion, three hundred nine million, eight hundred ninety-nine thousand, five hundred thirty-eight".