71838071786 has 16 divisors (see below), whose sum is σ = 116116219464. Its totient is φ = 33136003584.

The previous prime is 71838071779. The next prime is 71838071803. The reversal of 71838071786 is 68717083817.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24675697225 + 47162374561 = 157085^2 + 217169^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790655 + ... + 876818.

Almost surely, 2^71838071786 is an apocalyptic number.

71838071786 is a deficient number, since it is larger than the sum of its proper divisors (44278147678).

71838071786 is a wasteful number, since it uses less digits than its factorization.

71838071786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669145.

The product of its (nonzero) digits is 3161088, while the sum is 56.

The spelling of 71838071786 in words is "seventy-one billion, eight hundred thirty-eight million, seventy-one thousand, seven hundred eighty-six".