80742359105 has 4 divisors (see below), whose sum is σ = 96890830932. Its totient is φ = 64593887280.

The previous prime is 80742359101. The next prime is 80742359143. The reversal of 80742359105 is 50195324708.

It is a Cunningham number, because it is equal to 284152²+1.

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 29067522064 + 51674837041 = 170492^2 + 227321^2 .

It is not a de Polignac number, because 80742359105 - 2² = 80742359101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80742359101) 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, 8074235906 + ... + 8074235915.

It is an arithmetic number, because the mean of its divisors is an integer number (24222707733).

Almost surely, 2^80742359105 is an apocalyptic number.

It is an amenable number.

80742359105 is a deficient number, since it is larger than the sum of its proper divisors (16148471827).

80742359105 is a wasteful number, since it uses less digits than its factorization.

80742359105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16148471826.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 80742359105 in words is "eighty billion, seven hundred forty-two million, three hundred fifty-nine thousand, one hundred five".