71255711064 has 32 divisors (see below), whose sum is σ = 178154417520. Its totient is φ = 23749885056.

The previous prime is 71255711047. The next prime is 71255711119. The reversal of 71255711064 is 46011755217.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176974 + ... + 416930.

Almost surely, 2^71255711064 is an apocalyptic number.

It is an amenable number.

71255711064 is an abundant number, since it is smaller than the sum of its proper divisors (106898706456).

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

71255711064 is a wasteful number, since it uses less digits than its factorization.

71255711064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252339 (or 252335 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 71255711064 in words is "seventy-one billion, two hundred fifty-five million, seven hundred eleven thousand, sixty-four".