71368391889 has 6 divisors (see below), whose sum is σ = 103087677186. Its totient is φ = 47578927920.

The previous prime is 71368391873. The next prime is 71368391977. The reversal of 71368391889 is 98819386317.

It can be written as a sum of positive squares in only one way, i.e., 63897728400 + 7470663489 = 252780^2 + 86433^2 .

It is not a de Polignac number, because 71368391889 - 2⁴ = 71368391873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71368391389) 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 5 ways as a sum of consecutive naturals, for example, 3964910652 + ... + 3964910669.

It is an arithmetic number, because the mean of its divisors is an integer number (17181279531).

Almost surely, 2^71368391889 is an apocalyptic number.

It is an amenable number.

71368391889 is a deficient number, since it is larger than the sum of its proper divisors (31719285297).

71368391889 is a wasteful number, since it uses less digits than its factorization.

71368391889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7929821327 (or 7929821324 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 71368391889 in words is "seventy-one billion, three hundred sixty-eight million, three hundred ninety-one thousand, eight hundred eighty-nine".