2127291691673 has 2 divisors, whose sum is σ = 2127291691674. Its totient is φ = 2127291691672.

The previous prime is 2127291691663. The next prime is 2127291691699. The reversal of 2127291691673 is 3761961927212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684357517584 + 442934174089 = 1297828^2 + 665533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2127291691673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2127291691633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063645845836 + 1063645845837.

It is an arithmetic number, because the mean of its divisors is an integer number (1063645845837).

Almost surely, 2^{2127291691673} is an apocalyptic number.

It is an amenable number.

2127291691673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127291691673 is an equidigital number, since it uses as much as digits as its factorization.

2127291691673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 56.

The spelling of 2127291691673 in words is "two trillion, one hundred twenty-seven billion, two hundred ninety-one million, six hundred ninety-one thousand, six hundred seventy-three".