80768740249 has 4 divisors (see below), whose sum is σ = 82092818020. Its totient is φ = 79444662480.

The previous prime is 80768740231. The next prime is 80768740267. The reversal of 80768740249 is 94204786708.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (80768740231) and next prime (80768740267).

It can be written as a sum of positive squares in 2 ways, for example, as 3462498649 + 77306241600 = 58843^2 + 278040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80768740249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80768740249.

It is not an unprimeable number, because it can be changed into a prime (80768740229) 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, 662038794 + ... + 662038915.

It is an arithmetic number, because the mean of its divisors is an integer number (20523204505).

Almost surely, 2^80768740249 is an apocalyptic number.

It is an amenable number.

80768740249 is a deficient number, since it is larger than the sum of its proper divisors (1324077771).

80768740249 is a wasteful number, since it uses less digits than its factorization.

80768740249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324077770.

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 80768740249 in words is "eighty billion, seven hundred sixty-eight million, seven hundred forty thousand, two hundred forty-nine".