2557708539 has 4 divisors (see below), whose sum is σ = 3410278056. Its totient is φ = 1705139024.

The previous prime is 2557708529. The next prime is 2557708553. The reversal of 2557708539 is 9358077552.

It is a happy number.

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 2557708539 - 2⁴ = 2557708523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2557708491 and 2557708500.

It is not an unprimeable number, because it can be changed into a prime (2557708529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426284754 + ... + 426284759.

It is an arithmetic number, because the mean of its divisors is an integer number (852569514).

Almost surely, 2^2557708539 is an apocalyptic number.

2557708539 is a deficient number, since it is larger than the sum of its proper divisors (852569517).

2557708539 is an equidigital number, since it uses as much as digits as its factorization.

2557708539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852569516.

The product of its (nonzero) digits is 2646000, while the sum is 51.

The square root of 2557708539 is about 50573.7930058642. The cubic root of 2557708539 is about 1367.5724747497.

The spelling of 2557708539 in words is "two billion, five hundred fifty-seven million, seven hundred eight thousand, five hundred thirty-nine".