71609727469 has 16 divisors (see below), whose sum is σ = 82299732480. Its totient is φ = 61035534000.

The previous prime is 71609727383. The next prime is 71609727529. The reversal of 71609727469 is 96472790617.

It is not a de Polignac number, because 71609727469 - 2⁹ = 71609726957 is a prime.

It is a super-2 number, since 2×71609727469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71609707469) by changing a digit.

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, 1054662 + ... + 1120504.

It is an arithmetic number, because the mean of its divisors is an integer number (5143733280).

Almost surely, 2^71609727469 is an apocalyptic number.

It is an amenable number.

71609727469 is a deficient number, since it is larger than the sum of its proper divisors (10690005011).

71609727469 is a wasteful number, since it uses less digits than its factorization.

71609727469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66720.

The product of its (nonzero) digits is 8001504, while the sum is 58.

The spelling of 71609727469 in words is "seventy-one billion, six hundred nine million, seven hundred twenty-seven thousand, four hundred sixty-nine".