71103312161 has 16 divisors (see below), whose sum is σ = 84087444480. Its totient is φ = 58835427840.

The previous prime is 71103312127. The next prime is 71103312167. The reversal of 71103312161 is 16121330117.

It is not a de Polignac number, because 71103312161 - 2¹⁰ = 71103311137 is a prime.

It is a super-2 number, since 2×71103312161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71103312161.

It is not an unprimeable number, because it can be changed into a prime (71103312167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311816 + ... + 489321.

It is an arithmetic number, because the mean of its divisors is an integer number (5255465280).

Almost surely, 2^71103312161 is an apocalyptic number.

It is an amenable number.

71103312161 is a deficient number, since it is larger than the sum of its proper divisors (12984132319).

71103312161 is a wasteful number, since it uses less digits than its factorization.

71103312161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801584.

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 71103312161 its reverse (16121330117), we get a palindrome (87224642278).

The spelling of 71103312161 in words is "seventy-one billion, one hundred three million, three hundred twelve thousand, one hundred sixty-one".