80989779339 has 84 divisors (see below), whose sum is σ = 147422318544. Its totient is φ = 43556735232.

The previous prime is 80989779331. The next prime is 80989779379. The reversal of 80989779339 is 93397798908.

It is not a de Polignac number, because 80989779339 - 2³ = 80989779331 is a prime.

It is a super-2 number, since 2×80989779339² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80989779331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 1447309 + ... + 1502225.

Almost surely, 2^80989779339 is an apocalyptic number.

80989779339 is a deficient number, since it is larger than the sum of its proper divisors (66432539205).

80989779339 is an equidigital number, since it uses as much as digits as its factorization.

80989779339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54976 (or 54944 counting only the distinct ones).

The product of its (nonzero) digits is 185177664, while the sum is 72.

The spelling of 80989779339 in words is "eighty billion, nine hundred eighty-nine million, seven hundred seventy-nine thousand, three hundred thirty-nine".