71262111005 has 4 divisors (see below), whose sum is σ = 85514533212. Its totient is φ = 57009688800.

The previous prime is 71262110993. The next prime is 71262111061. The reversal of 71262111005 is 50011126217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50011126217 = 13 ⋅3847009709.

It can be written as a sum of positive squares in 2 ways, for example, as 42458250916 + 28803860089 = 206054^2 + 169717^2 .

It is not a de Polignac number, because 71262111005 - 2⁴ = 71262110989 is a prime.

It is a super-2 number, since 2×71262111005² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7126211096 + ... + 7126211105.

It is an arithmetic number, because the mean of its divisors is an integer number (21378633303).

Almost surely, 2^71262111005 is an apocalyptic number.

It is an amenable number.

71262111005 is a deficient number, since it is larger than the sum of its proper divisors (14252422207).

71262111005 is a wasteful number, since it uses less digits than its factorization.

71262111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14252422206.

The product of its (nonzero) digits is 840, while the sum is 26.

The spelling of 71262111005 in words is "seventy-one billion, two hundred sixty-two million, one hundred eleven thousand, five".