71443651508 has 6 divisors (see below), whose sum is σ = 125026390146. Its totient is φ = 35721825752.

The previous prime is 71443651507. The next prime is 71443651511. The reversal of 71443651508 is 80515634417.

It can be written as a sum of positive squares in only one way, i.e., 37317739684 + 34125911824 = 193178^2 + 184732^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71443651507) 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 as a sum of consecutive naturals, namely, 8930456435 + ... + 8930456442.

It is an arithmetic number, because the mean of its divisors is an integer number (20837731691).

Almost surely, 2^71443651508 is an apocalyptic number.

It is an amenable number.

71443651508 is a deficient number, since it is larger than the sum of its proper divisors (53582738638).

71443651508 is a wasteful number, since it uses less digits than its factorization.

71443651508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17860912881 (or 17860912879 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 71443651508 in words is "seventy-one billion, four hundred forty-three million, six hundred fifty-one thousand, five hundred eight".