71172423659 has 4 divisors (see below), whose sum is σ = 71173489920. Its totient is φ = 71171357400.

The previous prime is 71172423653. The next prime is 71172423661. The reversal of 71172423659 is 95632427117.

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 71172423659 - 2¹⁶ = 71172358123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71172423653) 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, 425804 + ... + 568905.

It is an arithmetic number, because the mean of its divisors is an integer number (17793372480).

Almost surely, 2^71172423659 is an apocalyptic number.

71172423659 is a deficient number, since it is larger than the sum of its proper divisors (1066261).

71172423659 is an equidigital number, since it uses as much as digits as its factorization.

71172423659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066260.

The product of its digits is 635040, while the sum is 47.

The spelling of 71172423659 in words is "seventy-one billion, one hundred seventy-two million, four hundred twenty-three thousand, six hundred fifty-nine".