71172235617 has 16 divisors (see below), whose sum is σ = 108459789312. Its totient is φ = 40667276880.

The previous prime is 71172235613. The next prime is 71172235691. The reversal of 71172235617 is 71653227117.

It is not a de Polignac number, because 71172235617 - 2² = 71172235613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71172235613) 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, 262438 + ... + 459584.

It is an arithmetic number, because the mean of its divisors is an integer number (6778736832).

Almost surely, 2^71172235617 is an apocalyptic number.

It is an amenable number.

71172235617 is a deficient number, since it is larger than the sum of its proper divisors (37287553695).

71172235617 is a wasteful number, since it uses less digits than its factorization.

71172235617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214348.

The product of its digits is 123480, while the sum is 42.

The spelling of 71172235617 in words is "seventy-one billion, one hundred seventy-two million, two hundred thirty-five thousand, six hundred seventeen".