80136220742 has 4 divisors (see below), whose sum is σ = 120204331116. Its totient is φ = 40068110370.

The previous prime is 80136220741. The next prime is 80136220781. The reversal of 80136220742 is 24702263108.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80136220741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20034055184 + ... + 20034055187.

It is an arithmetic number, because the mean of its divisors is an integer number (30051082779).

Almost surely, 2^80136220742 is an apocalyptic number.

80136220742 is a deficient number, since it is larger than the sum of its proper divisors (40068110374).

80136220742 is a wasteful number, since it uses less digits than its factorization.

80136220742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40068110373.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 80136220742 in words is "eighty billion, one hundred thirty-six million, two hundred twenty thousand, seven hundred forty-two".