271438915991 has 2 divisors, whose sum is σ = 271438915992. Its totient is φ = 271438915990.

The previous prime is 271438915961. The next prime is 271438916027. The reversal of 271438915991 is 199519834172.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 271438915991 - 2³⁴ = 254259046807 is a prime.

It is a super-2 number, since 2×271438915991² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 271438915991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (271438915921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135719457995 + 135719457996.

It is an arithmetic number, because the mean of its divisors is an integer number (135719457996).

Almost surely, 2^271438915991 is an apocalyptic number.

271438915991 is a deficient number, since it is larger than the sum of its proper divisors (1).

271438915991 is an equidigital number, since it uses as much as digits as its factorization.

271438915991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 59.

The spelling of 271438915991 in words is "two hundred seventy-one billion, four hundred thirty-eight million, nine hundred fifteen thousand, nine hundred ninety-one".