71157107771 has 4 divisors (see below), whose sum is σ = 71252878512. Its totient is φ = 71061337032.

The previous prime is 71157107761. The next prime is 71157107779. The reversal of 71157107771 is 17770175117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17770175117 = 8167 ⋅2175851.

It is a cyclic number.

It is not a de Polignac number, because 71157107771 - 2²⁶ = 71089998907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71157107779) 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, 47884256 + ... + 47885741.

It is an arithmetic number, because the mean of its divisors is an integer number (17813219628).

Almost surely, 2^71157107771 is an apocalyptic number.

71157107771 is a deficient number, since it is larger than the sum of its proper divisors (95770741).

71157107771 is an equidigital number, since it uses as much as digits as its factorization.

71157107771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95770740.

The product of its (nonzero) digits is 84035, while the sum is 44.

The spelling of 71157107771 in words is "seventy-one billion, one hundred fifty-seven million, one hundred seven thousand, seven hundred seventy-one".