71000743771 has 4 divisors (see below), whose sum is σ = 71664302232. Its totient is φ = 70337185312.

The previous prime is 71000743733. The next prime is 71000743787. The reversal of 71000743771 is 17734700017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17734700017 = 26561 ⋅667697.

It is a cyclic number.

It is not a de Polignac number, because 71000743771 - 2⁷ = 71000743643 is a prime.

It is a super-3 number, since 3×71000743771³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 71000743771.

It is not an unprimeable number, because it can be changed into a prime (71000743721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331779070 + ... + 331779283.

It is an arithmetic number, because the mean of its divisors is an integer number (17916075558).

Almost surely, 2^71000743771 is an apocalyptic number.

71000743771 is a deficient number, since it is larger than the sum of its proper divisors (663558461).

71000743771 is a wasteful number, since it uses less digits than its factorization.

71000743771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663558460.

The product of its (nonzero) digits is 28812, while the sum is 37.

The spelling of 71000743771 in words is "seventy-one billion, seven hundred forty-three thousand, seven hundred seventy-one".