71105717051 has 4 divisors (see below), whose sum is σ = 71250535704. Its totient is φ = 70960898400.

The previous prime is 71105717047. The next prime is 71105717071. The reversal of 71105717051 is 15071750117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15071750117 = 22699 ⋅663983.

It is a cyclic number.

It is not a de Polignac number, because 71105717051 - 2² = 71105717047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71105717071) 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, 72408590 + ... + 72409571.

It is an arithmetic number, because the mean of its divisors is an integer number (17812633926).

Almost surely, 2^71105717051 is an apocalyptic number.

71105717051 is a deficient number, since it is larger than the sum of its proper divisors (144818653).

71105717051 is a wasteful number, since it uses less digits than its factorization.

71105717051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144818652.

The product of its (nonzero) digits is 8575, while the sum is 35.

The spelling of 71105717051 in words is "seventy-one billion, one hundred five million, seven hundred seventeen thousand, fifty-one".