2542778093 has 4 divisors (see below), whose sum is σ = 2565280668. Its totient is φ = 2520275520.

The previous prime is 2542778081. The next prime is 2542778159. The reversal of 2542778093 is 3908772452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74874409 + 2467903684 = 8653^2 + 49678^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542778093 - 2⁸ = 2542777837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542778003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11251118 + ... + 11251343.

It is an arithmetic number, because the mean of its divisors is an integer number (641320167).

Almost surely, 2^2542778093 is an apocalyptic number.

It is an amenable number.

2542778093 is a deficient number, since it is larger than the sum of its proper divisors (22502575).

2542778093 is a wasteful number, since it uses less digits than its factorization.

2542778093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22502574.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 2542778093 is about 50425.9664557855. The cubic root of 2542778093 is about 1364.9062435660.

The spelling of 2542778093 in words is "two billion, five hundred forty-two million, seven hundred seventy-eight thousand, ninety-three".