71651012 has 6 divisors (see below), whose sum is σ = 125389278. Its totient is φ = 35825504.

The previous prime is 71651009. The next prime is 71651017. The reversal of 71651012 is 21015617.

It can be written as a sum of positive squares in only one way, i.e., 70291456 + 1359556 = 8384^2 + 1166^2 .

It is not an unprimeable number, because it can be changed into a prime (71651017) 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 as a sum of consecutive naturals, namely, 8956373 + ... + 8956380.

It is an arithmetic number, because the mean of its divisors is an integer number (20898213).

Almost surely, 2^71651012 is an apocalyptic number.

It is an amenable number.

71651012 is a deficient number, since it is larger than the sum of its proper divisors (53738266).

71651012 is a wasteful number, since it uses less digits than its factorization.

71651012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17912757 (or 17912755 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 71651012 is about 8464.6920794557. The cubic root of 71651012 is about 415.3435235669.

Adding to 71651012 its reverse (21015617), we get a palindrome (92666629).

The spelling of 71651012 in words is "seventy-one million, six hundred fifty-one thousand, twelve".