2557064687 has 2 divisors, whose sum is σ = 2557064688. Its totient is φ = 2557064686.

The previous prime is 2557064663. The next prime is 2557064777. The reversal of 2557064687 is 7864607552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2557064687 - 2⁶ = 2557064623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557264687) 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, 1278532343 + 1278532344.

It is an arithmetic number, because the mean of its divisors is an integer number (1278532344).

Almost surely, 2^2557064687 is an apocalyptic number.

2557064687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557064687 is an equidigital number, since it uses as much as digits as its factorization.

2557064687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The square root of 2557064687 is about 50567.4271344707. The cubic root of 2557064687 is about 1367.4577121078.

The spelling of 2557064687 in words is "two billion, five hundred fifty-seven million, sixty-four thousand, six hundred eighty-seven".