71888845393 has 4 divisors (see below), whose sum is σ = 73642231908. Its totient is φ = 70135458880.

The previous prime is 71888845339. The next prime is 71888845459. The reversal of 71888845393 is 39354888817.

It is a happy number.

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 38420704144 + 33468141249 = 196012^2 + 182943^2 .

It is a cyclic number.

It is not a de Polignac number, because 71888845393 - 2¹⁷ = 71888714321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71888848393) 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, 876693196 + ... + 876693277.

It is an arithmetic number, because the mean of its divisors is an integer number (18410557977).

Almost surely, 2^71888845393 is an apocalyptic number.

It is an amenable number.

71888845393 is a deficient number, since it is larger than the sum of its proper divisors (1753386515).

71888845393 is a wasteful number, since it uses less digits than its factorization.

71888845393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753386514.

The product of its digits is 46448640, while the sum is 64.

The spelling of 71888845393 in words is "seventy-one billion, eight hundred eighty-eight million, eight hundred forty-five thousand, three hundred ninety-three".