2146445405777 has 2 divisors, whose sum is σ = 2146445405778. Its totient is φ = 2146445405776.

The previous prime is 2146445405773. The next prime is 2146445405791. The reversal of 2146445405777 is 7775045446412.

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., 1099580834881 + 1046864570896 = 1048609^2 + 1023164^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146445405777 - 2² = 2146445405773 is a prime.

It is not a weakly prime, because it can be changed into another prime (2146445405771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073222702888 + 1073222702889.

It is an arithmetic number, because the mean of its divisors is an integer number (1073222702889).

Almost surely, 2^{2146445405777} is an apocalyptic number.

It is an amenable number.

2146445405777 is a deficient number, since it is larger than the sum of its proper divisors (1).

2146445405777 is an equidigital number, since it uses as much as digits as its factorization.

2146445405777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26342400, while the sum is 56.

The spelling of 2146445405777 in words is "two trillion, one hundred forty-six billion, four hundred forty-five million, four hundred five thousand, seven hundred seventy-seven".