80108515138 has 4 divisors (see below), whose sum is σ = 120162772710. Its totient is φ = 40054257568.

The previous prime is 80108515127. The next prime is 80108515147. The reversal of 80108515138 is 83151580108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77675362209 + 2433152929 = 278703^2 + 49327^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80108515138.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20027128783 + ... + 20027128786.

Almost surely, 2^80108515138 is an apocalyptic number.

80108515138 is a deficient number, since it is larger than the sum of its proper divisors (40054257572).

80108515138 is a wasteful number, since it uses less digits than its factorization.

80108515138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40054257571.

The product of its (nonzero) digits is 38400, while the sum is 40.

The spelling of 80108515138 in words is "eighty billion, one hundred eight million, five hundred fifteen thousand, one hundred thirty-eight".