2542797778 has 64 divisors (see below), whose sum is σ = 4292870400. Its totient is φ = 1124444160.

The previous prime is 2542797743. The next prime is 2542797781. The reversal of 2542797778 is 8777972452.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7545226 + ... + 7545562.

It is an arithmetic number, because the mean of its divisors is an integer number (67076100).

Almost surely, 2^2542797778 is an apocalyptic number.

2542797778 is a deficient number, since it is larger than the sum of its proper divisors (1750072622).

2542797778 is a wasteful number, since it uses less digits than its factorization.

2542797778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its digits is 13829760, while the sum is 58.

The square root of 2542797778 is about 50426.1616425442. The cubic root of 2542797778 is about 1364.9097657124.

The spelling of 2542797778 in words is "two billion, five hundred forty-two million, seven hundred ninety-seven thousand, seven hundred seventy-eight".