2173671661739 has 8 divisors (see below), whose sum is σ = 2217955692240. Its totient is φ = 2129508792736.

The previous prime is 2173671661727. The next prime is 2173671661771. The reversal of 2173671661739 is 9371661763712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2173671661739 - 2²⁴ = 2173654884523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2173671661789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30254129 + ... + 30325890.

It is an arithmetic number, because the mean of its divisors is an integer number (277244461530).

Almost surely, 2^{2173671661739} is an apocalyptic number.

2173671661739 is a deficient number, since it is larger than the sum of its proper divisors (44284030501).

2173671661739 is an equidigital number, since it uses as much as digits as its factorization.

2173671661739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60580749.

The product of its digits is 12002256, while the sum is 59.

The spelling of 2173671661739 in words is "two trillion, one hundred seventy-three billion, six hundred seventy-one million, six hundred sixty-one thousand, seven hundred thirty-nine".