71451994041 has 12 divisors (see below), whose sum is σ = 109279520532. Its totient is φ = 44832623616.

The previous prime is 71451994037. The next prime is 71451994063. The reversal of 71451994041 is 14049915417.

71451994041 is a `hidden beast` number, since 7 + 1 + 4 + 519 + 94 + 0 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25818062400 + 45633931641 = 160680^2 + 213621^2 .

It is not a de Polignac number, because 71451994041 - 2² = 71451994037 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71451994441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233503096 + ... + 233503401.

It is an arithmetic number, because the mean of its divisors is an integer number (9106626711).

Almost surely, 2^71451994041 is an apocalyptic number.

It is an amenable number.

71451994041 is a deficient number, since it is larger than the sum of its proper divisors (37827526491).

71451994041 is a wasteful number, since it uses less digits than its factorization.

71451994041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467006520 (or 467006517 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 71451994041 in words is "seventy-one billion, four hundred fifty-one million, nine hundred ninety-four thousand, forty-one".