80777535109 has 4 divisors (see below), whose sum is σ = 83383262080. Its totient is φ = 78171808140.

The previous prime is 80777535049. The next prime is 80777535133. The reversal of 80777535109 is 90153577708.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80777535109 - 2¹⁵ = 80777502341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80777035109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302863439 + ... + 1302863500.

It is an arithmetic number, because the mean of its divisors is an integer number (20845815520).

Almost surely, 2^80777535109 is an apocalyptic number.

It is an amenable number.

80777535109 is a deficient number, since it is larger than the sum of its proper divisors (2605726971).

80777535109 is a wasteful number, since it uses less digits than its factorization.

80777535109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605726970.

The product of its (nonzero) digits is 1852200, while the sum is 52.

The spelling of 80777535109 in words is "eighty billion, seven hundred seventy-seven million, five hundred thirty-five thousand, one hundred nine".