2171344518377 has 4 divisors (see below), whose sum is σ = 2174629457796. Its totient is φ = 2168059578960.

The previous prime is 2171344518373. The next prime is 2171344518383. The reversal of 2171344518377 is 7738154431712.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1685073994816 + 486270523561 = 1298104^2 + 697331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171344518377 - 2² = 2171344518373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171344518373) 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, 1642468718 + ... + 1642470039.

It is an arithmetic number, because the mean of its divisors is an integer number (543657364449).

Almost surely, 2^{2171344518377} is an apocalyptic number.

It is an amenable number.

2171344518377 is a deficient number, since it is larger than the sum of its proper divisors (3284939419).

2171344518377 is an equidigital number, since it uses as much as digits as its factorization.

2171344518377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284939418.

The product of its digits is 3951360, while the sum is 53.

The spelling of 2171344518377 in words is "two trillion, one hundred seventy-one billion, three hundred forty-four million, five hundred eighteen thousand, three hundred seventy-seven".