2557674397 has 4 divisors (see below), whose sum is σ = 2559603136. Its totient is φ = 2555745660.

The previous prime is 2557674389. The next prime is 2557674433. The reversal of 2557674397 is 7934767552.

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 not a de Polignac number, because 2557674397 - 2³ = 2557674389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557674337) 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, 962379 + ... + 965032.

It is an arithmetic number, because the mean of its divisors is an integer number (639900784).

Almost surely, 2^2557674397 is an apocalyptic number.

It is an amenable number.

2557674397 is a deficient number, since it is larger than the sum of its proper divisors (1928739).

2557674397 is a wasteful number, since it uses less digits than its factorization.

2557674397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928738.

The product of its digits is 11113200, while the sum is 55.

The square root of 2557674397 is about 50573.4554583726. The cubic root of 2557674397 is about 1367.5663896327.

The spelling of 2557674397 in words is "two billion, five hundred fifty-seven million, six hundred seventy-four thousand, three hundred ninety-seven".