2557934779 has 4 divisors (see below), whose sum is σ = 2558238120. Its totient is φ = 2557631440.

The previous prime is 2557934749. The next prime is 2557934789. The reversal of 2557934779 is 9774397552.

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

It is a cyclic number.

It is not a de Polignac number, because 2557934779 - 2⁵ = 2557934747 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557934749) 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, 138649 + ... + 156010.

It is an arithmetic number, because the mean of its divisors is an integer number (639559530).

Almost surely, 2^2557934779 is an apocalyptic number.

2557934779 is a deficient number, since it is larger than the sum of its proper divisors (303341).

2557934779 is an equidigital number, since it uses as much as digits as its factorization.

2557934779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303340.

The product of its digits is 16669800, while the sum is 58.

The square root of 2557934779 is about 50576.0296879856. The cubic root of 2557934779 is about 1367.6127960594.

The spelling of 2557934779 in words is "two billion, five hundred fifty-seven million, nine hundred thirty-four thousand, seven hundred seventy-nine".