71408551418 has 12 divisors (see below), whose sum is σ = 110933739150. Its totient is φ = 34473092976.

The previous prime is 71408551399. The next prime is 71408551439. The reversal of 71408551418 is 81415580417.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 52763468209 + 18645083209 = 229703^2 + 136547^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21225593 + ... + 21228956.

Almost surely, 2^71408551418 is an apocalyptic number.

71408551418 is a deficient number, since it is larger than the sum of its proper divisors (39525187732).

71408551418 is a wasteful number, since it uses less digits than its factorization.

71408551418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42454609 (or 42454580 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 44.

It can be divided in two parts, 7140 and 8551418, that added together give a palindrome (8558558).

The spelling of 71408551418 in words is "seventy-one billion, four hundred eight million, five hundred fifty-one thousand, four hundred eighteen".