71705927956 has 12 divisors (see below), whose sum is σ = 135138095092. Its totient is φ = 33095043648.

The previous prime is 71705927899. The next prime is 71705927957. The reversal of 71705927956 is 65972950717.

It can be written as a sum of positive squares in 2 ways, for example, as 46461802500 + 25244125456 = 215550^2 + 158884^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71705927956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71705927957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689480025 + ... + 689480128.

Almost surely, 2^71705927956 is an apocalyptic number.

It is an amenable number.

71705927956 is a deficient number, since it is larger than the sum of its proper divisors (63432167136).

71705927956 is a wasteful number, since it uses less digits than its factorization.

71705927956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378960170 (or 1378960168 counting only the distinct ones).

The product of its (nonzero) digits is 8334900, while the sum is 58.

The spelling of 71705927956 in words is "seventy-one billion, seven hundred five million, nine hundred twenty-seven thousand, nine hundred fifty-six".