271991956697 has 4 divisors (see below), whose sum is σ = 280765890816. Its totient is φ = 263218022580.

The previous prime is 271991956669. The next prime is 271991956703. The reversal of 271991956697 is 796659199172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 271991956697 - 2⁶ = 271991956633 is a prime.

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 271991956697.

It is not an unprimeable number, because it can be changed into a prime (271991956667) 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, 4386967013 + ... + 4386967074.

It is an arithmetic number, because the mean of its divisors is an integer number (70191472704).

Almost surely, 2^271991956697 is an apocalyptic number.

It is an amenable number.

271991956697 is a deficient number, since it is larger than the sum of its proper divisors (8773934119).

271991956697 is an equidigital number, since it uses as much as digits as its factorization.

271991956697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8773934118.

The product of its digits is 115736040, while the sum is 71.

The spelling of 271991956697 in words is "two hundred seventy-one billion, nine hundred ninety-one million, nine hundred fifty-six thousand, six hundred ninety-seven".