71681356 has 6 divisors (see below), whose sum is σ = 125442380. Its totient is φ = 35840676.

The previous prime is 71681341. The next prime is 71681377. The reversal of 71681356 is 65318617.

It is an unprimeable number.

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, 8960166 + ... + 8960173.

Almost surely, 2^71681356 is an apocalyptic number.

It is an amenable number.

71681356 is a deficient number, since it is larger than the sum of its proper divisors (53761024).

71681356 is a wasteful number, since it uses less digits than its factorization.

71681356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17920343 (or 17920341 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 71681356 is about 8466.4842762507. The cubic root of 71681356 is about 415.4021475594.

The spelling of 71681356 in words is "seventy-one million, six hundred eighty-one thousand, three hundred fifty-six".