71956938387 has 6 divisors (see below), whose sum is σ = 95943204012. Its totient is φ = 47970982512.

The previous prime is 71956938371. The next prime is 71956938413. The reversal of 71956938387 is 78383965917.

It is not a de Polignac number, because 71956938387 - 2⁴ = 71956938371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71956938307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387183 + ... + 542055.

It is an arithmetic number, because the mean of its divisors is an integer number (15990534002).

Almost surely, 2^71956938387 is an apocalyptic number.

71956938387 is a deficient number, since it is larger than the sum of its proper divisors (23986265625).

71956938387 is an frugal number, since it uses more digits than its factorization.

71956938387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309749 (or 154876 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 66.

The spelling of 71956938387 in words is "seventy-one billion, nine hundred fifty-six million, nine hundred thirty-eight thousand, three hundred eighty-seven".