71771768 has 8 divisors (see below), whose sum is σ = 134572080. Its totient is φ = 35885880.

The previous prime is 71771747. The next prime is 71771809. The reversal of 71771768 is 86717717.

It is a tau number, because it is divible by the number of its divisors (8).

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, 4485728 + ... + 4485743.

It is an arithmetic number, because the mean of its divisors is an integer number (16821510).

Almost surely, 2^71771768 is an apocalyptic number.

It is an amenable number.

71771768 is a deficient number, since it is larger than the sum of its proper divisors (62800312).

71771768 is a wasteful number, since it uses less digits than its factorization.

71771768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971477 (or 8971473 counting only the distinct ones).

The product of its digits is 115248, while the sum is 44.

The square root of 71771768 is about 8471.8220000187. The cubic root of 71771768 is about 415.5767236821.

The spelling of 71771768 in words is "seventy-one million, seven hundred seventy-one thousand, seven hundred sixty-eight".