2145489435977 has 2 divisors, whose sum is σ = 2145489435978. Its totient is φ = 2145489435976.

The previous prime is 2145489435967. The next prime is 2145489436007. The reversal of 2145489435977 is 7795349845412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2144537651776 + 951784201 = 1464424^2 + 30851^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145489435977 - 2⁸ = 2145489435721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145489435907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072744717988 + 1072744717989.

It is an arithmetic number, because the mean of its divisors is an integer number (1072744717989).

Almost surely, 2^{2145489435977} is an apocalyptic number.

It is an amenable number.

2145489435977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145489435977 is an equidigital number, since it uses as much as digits as its factorization.

2145489435977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 304819200, while the sum is 68.

The spelling of 2145489435977 in words is "two trillion, one hundred forty-five billion, four hundred eighty-nine million, four hundred thirty-five thousand, nine hundred seventy-seven".