80423044729 has 4 divisors (see below), whose sum is σ = 85153812084. Its totient is φ = 75692277376.

The previous prime is 80423044699. The next prime is 80423044733. The reversal of 80423044729 is 92744032408.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46417840704 + 34005204025 = 215448^2 + 184405^2 .

It is a cyclic number.

It is not a de Polignac number, because 80423044729 - 2⁹ = 80423044217 is a prime.

It is a super-2 number, since 2×80423044729² (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 (80423044739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2365383652 + ... + 2365383685.

It is an arithmetic number, because the mean of its divisors is an integer number (21288453021).

Almost surely, 2^80423044729 is an apocalyptic number.

It is an amenable number.

80423044729 is a deficient number, since it is larger than the sum of its proper divisors (4730767355).

80423044729 is a wasteful number, since it uses less digits than its factorization.

80423044729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730767354.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 80423044729 in words is "eighty billion, four hundred twenty-three million, forty-four thousand, seven hundred twenty-nine".