8128040071 has 4 divisors (see below), whose sum is σ = 8390234944. Its totient is φ = 7865845200.

The previous prime is 8128040059. The next prime is 8128040093. The reversal of 8128040071 is 1700408218.

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 8128040071 - 2⁹ = 8128039559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 262194841 = 8128040071 / (8 + 1 + 2 + 8 + 0 + 4 + 0 + 0 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128040671) 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, 131097390 + ... + 131097451.

It is an arithmetic number, because the mean of its divisors is an integer number (2097558736).

Almost surely, 2^8128040071 is an apocalyptic number.

8128040071 is a deficient number, since it is larger than the sum of its proper divisors (262194873).

8128040071 is a wasteful number, since it uses less digits than its factorization.

8128040071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262194872.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 8128040071 is about 90155.6435892951. The cubic root of 8128040071 is about 2010.6135822196.

Adding to 8128040071 its reverse (1700408218), we get a palindrome (9828448289).

The spelling of 8128040071 in words is "eight billion, one hundred twenty-eight million, forty thousand, seventy-one".