71321011744 has 48 divisors (see below), whose sum is σ = 152691072408. Its totient is φ = 32655716352.

The previous prime is 71321011717. The next prime is 71321011747. The reversal of 71321011744 is 44711012317.

It can be written as a sum of positive squares in 4 ways, for example, as 71295408144 + 25603600 = 267012^2 + 5060^2 .

It is not an unprimeable number, because it can be changed into a prime (71321011747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1751559 + ... + 1791814.

Almost surely, 2^71321011744 is an apocalyptic number.

71321011744 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

71321011744 is an abundant number, since it is smaller than the sum of its proper divisors (81370060664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71321011744 is a wasteful number, since it uses less digits than its factorization.

71321011744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543437 (or 3543429 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The spelling of 71321011744 in words is "seventy-one billion, three hundred twenty-one million, eleven thousand, seven hundred forty-four".