80231388779 has 4 divisors (see below), whose sum is σ = 80237805984. Its totient is φ = 80224971576.

The previous prime is 80231388733. The next prime is 80231388821. The reversal of 80231388779 is 97788313208.

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

It is a cyclic number.

It is not a de Polignac number, because 80231388779 - 2¹⁶ = 80231323243 is a prime.

It is a super-2 number, since 2×80231388779² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80231388709) 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, 3189812 + ... + 3214865.

It is an arithmetic number, because the mean of its divisors is an integer number (20059451496).

Almost surely, 2^80231388779 is an apocalyptic number.

80231388779 is a deficient number, since it is larger than the sum of its proper divisors (6417205).

80231388779 is a wasteful number, since it uses less digits than its factorization.

80231388779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417204.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 80231388779 in words is "eighty billion, two hundred thirty-one million, three hundred eighty-eight thousand, seven hundred seventy-nine".