2557669393 has 4 divisors (see below), whose sum is σ = 2561131120. Its totient is φ = 2554207668.

The previous prime is 2557669379. The next prime is 2557669399. The reversal of 2557669393 is 3939667552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2557669393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557669399) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1729755 + ... + 1731232.

It is an arithmetic number, because the mean of its divisors is an integer number (640282780).

Almost surely, 2^2557669393 is an apocalyptic number.

It is an amenable number.

2557669393 is a deficient number, since it is larger than the sum of its proper divisors (3461727).

2557669393 is an equidigital number, since it uses as much as digits as its factorization.

2557669393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461726.

The product of its digits is 9185400, while the sum is 55.

The square root of 2557669393 is about 50573.4059857550. The cubic root of 2557669393 is about 1367.5654977669.

The spelling of 2557669393 in words is "two billion, five hundred fifty-seven million, six hundred sixty-nine thousand, three hundred ninety-three".