71259197065 has 16 divisors (see below), whose sum is σ = 100368168192. Its totient is φ = 47542814784.

The previous prime is 71259197027. The next prime is 71259197153. The reversal of 71259197065 is 56079195217.

It is a cyclic number.

It is not a de Polignac number, because 71259197065 - 2⁹ = 71259196553 is a prime.

It is a super-2 number, since 2×71259197065² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27511909 + ... + 27514498.

It is an arithmetic number, because the mean of its divisors is an integer number (6273010512).

Almost surely, 2^71259197065 is an apocalyptic number.

It is an amenable number.

71259197065 is a deficient number, since it is larger than the sum of its proper divisors (29108971127).

71259197065 is a wasteful number, since it uses less digits than its factorization.

71259197065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55026456.

The product of its (nonzero) digits is 1190700, while the sum is 52.

It can be divided in two parts, 71259 and 197065, that added together give a square (268324 = 518²).

The spelling of 71259197065 in words is "seventy-one billion, two hundred fifty-nine million, one hundred ninety-seven thousand, sixty-five".