271620634721861 has 4 divisors (see below), whose sum is σ = 271901524727712. Its totient is φ = 271339744716012.

The previous prime is 271620634721773. The next prime is 271620634721873. The reversal of 271620634721861 is 168127436026172.

It is a happy number.

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 271620634721861 - 2²² = 271620630527557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 271620634721797 and 271620634721806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (271620634721561) 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, 140445001475 + ... + 140445003408.

It is an arithmetic number, because the mean of its divisors is an integer number (67975381181928).

Almost surely, 2^{271620634721861} is an apocalyptic number.

It is an amenable number.

271620634721861 is a deficient number, since it is larger than the sum of its proper divisors (280890005851).

271620634721861 is an equidigital number, since it uses as much as digits as its factorization.

271620634721861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280890005850.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 271620634721861 in words is "two hundred seventy-one trillion, six hundred twenty billion, six hundred thirty-four million, seven hundred twenty-one thousand, eight hundred sixty-one".