71818612 has 6 divisors (see below), whose sum is σ = 125682578. Its totient is φ = 35909304.

The previous prime is 71818603. The next prime is 71818631. The reversal of 71818612 is 21681817.

It can be written as a sum of positive squares in only one way, i.e., 70660836 + 1157776 = 8406^2 + 1076^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8977323 + ... + 8977330.

Almost surely, 2^71818612 is an apocalyptic number.

It is an amenable number.

71818612 is a deficient number, since it is larger than the sum of its proper divisors (53863966).

71818612 is a wasteful number, since it uses less digits than its factorization.

71818612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17954657 (or 17954655 counting only the distinct ones).

The product of its digits is 5376, while the sum is 34.

The square root of 71818612 is about 8474.5862435874. The cubic root of 71818612 is about 415.6671168958.

The spelling of 71818612 in words is "seventy-one million, eight hundred eighteen thousand, six hundred twelve".