2553238779 has 64 divisors (see below), whose sum is σ = 4266114048. Its totient is φ = 1322496000.

The previous prime is 2553238769. The next prime is 2553238811. The reversal of 2553238779 is 9778323552.

It is a happy number.

It is not a de Polignac number, because 2553238779 - 2⁹ = 2553238267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2553238769) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6366979 + ... + 6367379.

It is an arithmetic number, because the mean of its divisors is an integer number (66658032).

Almost surely, 2^2553238779 is an apocalyptic number.

2553238779 is a deficient number, since it is larger than the sum of its proper divisors (1712875269).

2553238779 is a wasteful number, since it uses less digits than its factorization.

2553238779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its digits is 3175200, while the sum is 51.

The square root of 2553238779 is about 50529.5832062763. The cubic root of 2553238779 is about 1366.7753699841.

The spelling of 2553238779 in words is "two billion, five hundred fifty-three million, two hundred thirty-eight thousand, seven hundred seventy-nine".