71965498205 has 16 divisors (see below), whose sum is σ = 88862317824. Its totient is φ = 55909206720.

The previous prime is 71965498147. The next prime is 71965498223. The reversal of 71965498205 is 50289456917.

It is not a de Polignac number, because 71965498205 - 2²² = 71961303901 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 275141 + ... + 468650.

It is an arithmetic number, because the mean of its divisors is an integer number (5553894864).

Almost surely, 2^71965498205 is an apocalyptic number.

It is an amenable number.

71965498205 is a deficient number, since it is larger than the sum of its proper divisors (16896819619).

71965498205 is a wasteful number, since it uses less digits than its factorization.

71965498205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744356.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 71965498205 in words is "seventy-one billion, nine hundred sixty-five million, four hundred ninety-eight thousand, two hundred five".