2540309977 has 2 divisors, whose sum is σ = 2540309978. Its totient is φ = 2540309976.

The previous prime is 2540309971. The next prime is 2540310061. The reversal of 2540309977 is 7799030452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1844616601 + 695693376 = 42949^2 + 26376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540309977 - 2¹¹ = 2540307929 is a prime.

It is not a weakly prime, because it can be changed into another prime (2540309971) 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, 1270154988 + 1270154989.

It is an arithmetic number, because the mean of its divisors is an integer number (1270154989).

Almost surely, 2^2540309977 is an apocalyptic number.

It is an amenable number.

2540309977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540309977 is an equidigital number, since it uses as much as digits as its factorization.

2540309977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 2540309977 is about 50401.4878451024. The cubic root of 2540309977 is about 1364.4644908389.

The spelling of 2540309977 in words is "two billion, five hundred forty million, three hundred nine thousand, nine hundred seventy-seven".