2542455665 has 16 divisors (see below), whose sum is σ = 3157796880. Its totient is φ = 1962804480.

The previous prime is 2542455659. The next prime is 2542455679. The reversal of 2542455665 is 5665542452.

It can be written as a sum of positive squares in 8 ways, for example, as 611028961 + 1931426704 = 24719^2 + 43948^2 .

It is not a de Polignac number, because 2542455665 - 2⁴ = 2542455649 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 394247 + ... + 400643.

It is an arithmetic number, because the mean of its divisors is an integer number (197362305).

Almost surely, 2^2542455665 is an apocalyptic number.

It is an amenable number.

2542455665 is a deficient number, since it is larger than the sum of its proper divisors (615341215).

2542455665 is a wasteful number, since it uses less digits than its factorization.

2542455665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172.

The product of its digits is 1440000, while the sum is 44.

The square root of 2542455665 is about 50422.7693110960. The cubic root of 2542455665 is about 1364.8485504214.

The spelling of 2542455665 in words is "two billion, five hundred forty-two million, four hundred fifty-five thousand, six hundred sixty-five".