2129545577 has 2 divisors, whose sum is σ = 2129545578. Its totient is φ = 2129545576.

The previous prime is 2129545553. The next prime is 2129545591. The reversal of 2129545577 is 7755459212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2121615721 + 7929856 = 46061^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129545577 - 2¹⁰ = 2129544553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2129545277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064772788 + 1064772789.

It is an arithmetic number, because the mean of its divisors is an integer number (1064772789).

Almost surely, 2^2129545577 is an apocalyptic number.

It is an amenable number.

2129545577 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129545577 is an equidigital number, since it uses as much as digits as its factorization.

2129545577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 47.

The square root of 2129545577 is about 46146.9996532819. Note that the first 3 decimals coincide. The cubic root of 2129545577 is about 1286.5568450910.

The spelling of 2129545577 in words is "two billion, one hundred twenty-nine million, five hundred forty-five thousand, five hundred seventy-seven".