2145255577 has 2 divisors, whose sum is σ = 2145255578. Its totient is φ = 2145255576.

The previous prime is 2145255569. The next prime is 2145255601. The reversal of 2145255577 is 7755525412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1859679376 + 285576201 = 43124^2 + 16899^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145255577 - 2³ = 2145255569 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145250577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072627788 + 1072627789.

It is an arithmetic number, because the mean of its divisors is an integer number (1072627789).

Almost surely, 2^2145255577 is an apocalyptic number.

It is an amenable number.

2145255577 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145255577 is an equidigital number, since it uses as much as digits as its factorization.

2145255577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 490000, while the sum is 43.

The square root of 2145255577 is about 46316.9037933237. The cubic root of 2145255577 is about 1289.7128092927.

The spelling of 2145255577 in words is "two billion, one hundred forty-five million, two hundred fifty-five thousand, five hundred seventy-seven".