2542797779 has 4 divisors (see below), whose sum is σ = 2543113776. Its totient is φ = 2542481784.

The previous prime is 2542797743. The next prime is 2542797781. The reversal of 2542797779 is 9777972452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2542797779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2542797709) 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, 145604 + ... + 162129.

It is an arithmetic number, because the mean of its divisors is an integer number (635778444).

Almost surely, 2^2542797779 is an apocalyptic number.

2542797779 is a deficient number, since it is larger than the sum of its proper divisors (315997).

2542797779 is an equidigital number, since it uses as much as digits as its factorization.

2542797779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315996.

The product of its digits is 15558480, while the sum is 59.

The square root of 2542797779 is about 50426.1616524597. The cubic root of 2542797779 is about 1364.9097658913.

The spelling of 2542797779 in words is "two billion, five hundred forty-two million, seven hundred ninety-seven thousand, seven hundred seventy-nine".