71286256744 has 16 divisors (see below), whose sum is σ = 133715729700. Its totient is φ = 35628728832.

The previous prime is 71286256733. The next prime is 71286256759. The reversal of 71286256744 is 44765268217.

It can be written as a sum of positive squares in 2 ways, for example, as 67511628900 + 3774627844 = 259830^2 + 61438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71286256691 and 71286256700.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1778889 + ... + 1818520.

Almost surely, 2^71286256744 is an apocalyptic number.

It is an amenable number.

71286256744 is a deficient number, since it is larger than the sum of its proper divisors (62429472956).

71286256744 is a wasteful number, since it uses less digits than its factorization.

71286256744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599892 (or 3599888 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 52.

The spelling of 71286256744 in words is "seventy-one billion, two hundred eighty-six million, two hundred fifty-six thousand, seven hundred forty-four".