11718271571 has 2 divisors, whose sum is σ = 11718271572. Its totient is φ = 11718271570.

The previous prime is 11718271561. The next prime is 11718271589. The reversal of 11718271571 is 17517281711.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11718271571 is a prime.

It is a super-2 number, since 2×11718271571² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11718271511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859135785 + 5859135786.

It is an arithmetic number, because the mean of its divisors is an integer number (5859135786).

Almost surely, 2^11718271571 is an apocalyptic number.

11718271571 is a deficient number, since it is larger than the sum of its proper divisors (1).

11718271571 is an equidigital number, since it uses as much as digits as its factorization.

11718271571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27440, while the sum is 41.

The spelling of 11718271571 in words is "eleven billion, seven hundred eighteen million, two hundred seventy-one thousand, five hundred seventy-one".