71497144711 has 4 divisors (see below), whose sum is σ = 71867596432. Its totient is φ = 71126692992.

The previous prime is 71497144703. The next prime is 71497144727. The reversal of 71497144711 is 11744179417.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11744179417 = 2711 ⋅4332047.

It is a cyclic number.

It is not a de Polignac number, because 71497144711 - 2³ = 71497144703 is a prime.

It is a super-2 number, since 2×71497144711² (a number of 23 digits) contains 22 as substring.

It is the 267390-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71497144751) by changing a digit.

It is a nontrivial repunit in base 267389.

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 3 ways as a sum of consecutive naturals, for example, 185225571 + ... + 185225956.

It is an arithmetic number, because the mean of its divisors is an integer number (17966899108).

Almost surely, 2^71497144711 is an apocalyptic number.

71497144711 is a deficient number, since it is larger than the sum of its proper divisors (370451721).

71497144711 is a wasteful number, since it uses less digits than its factorization.

71497144711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370451720.

The product of its digits is 197568, while the sum is 46.

The spelling of 71497144711 in words is "seventy-one billion, four hundred ninety-seven million, one hundred forty-four thousand, seven hundred eleven".