71371663965 has 48 divisors (see below), whose sum is σ = 141617169408. Its totient is φ = 32573207808.

The previous prime is 71371663963. The next prime is 71371663981. The reversal of 71371663965 is 56936617317.

It is not a de Polignac number, because 71371663965 - 2¹ = 71371663963 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71371663963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4569 + ... + 377841.

It is an arithmetic number, because the mean of its divisors is an integer number (2950357696).

Almost surely, 2^71371663965 is an apocalyptic number.

It is an amenable number.

71371663965 is a deficient number, since it is larger than the sum of its proper divisors (70245505443).

71371663965 is a wasteful number, since it uses less digits than its factorization.

71371663965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373898 (or 373895 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The spelling of 71371663965 in words is "seventy-one billion, three hundred seventy-one million, six hundred sixty-three thousand, nine hundred sixty-five".