71139910691766 has 32 divisors (see below), whose sum is σ = 162609026519808. Its totient is φ = 20325249223200.

The previous prime is 71139910691741. The next prime is 71139910691803. The reversal of 71139910691766 is 66719601993117.

It is a junction number, because it is equal to n+sod(n) for n = 71139910691697 and 71139910691706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16346620 + ... + 20235903.

It is an arithmetic number, because the mean of its divisors is an integer number (5081532078744).

Almost surely, 2^{71139910691766} is an apocalyptic number.

71139910691766 is an abundant number, since it is smaller than the sum of its proper divisors (91469115828042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71139910691766 is a wasteful number, since it uses less digits than its factorization.

71139910691766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36628836.

The product of its (nonzero) digits is 23147208, while the sum is 66.

The spelling of 71139910691766 in words is "seventy-one trillion, one hundred thirty-nine billion, nine hundred ten million, six hundred ninety-one thousand, seven hundred sixty-six".