80606845538 has 4 divisors (see below), whose sum is σ = 120910268310. Its totient is φ = 40303422768.

The previous prime is 80606845537. The next prime is 80606845547. The reversal of 80606845538 is 83554860608.

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., 61307245609 + 19299599929 = 247603^2 + 138923^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80606845538.

It is not an unprimeable number, because it can be changed into a prime (80606845531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20151711383 + ... + 20151711386.

Almost surely, 2^80606845538 is an apocalyptic number.

80606845538 is a deficient number, since it is larger than the sum of its proper divisors (40303422772).

80606845538 is a wasteful number, since it uses less digits than its factorization.

80606845538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40303422771.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 80606845538 in words is "eighty billion, six hundred six million, eight hundred forty-five thousand, five hundred thirty-eight".