257043882877 has 4 divisors (see below), whose sum is σ = 263313245916. Its totient is φ = 250774519840.

The previous prime is 257043882871. The next prime is 257043882941. The reversal of 257043882877 is 778288340752.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13910079481 + 243133803396 = 117941^2 + 493086^2 .

It is a cyclic number.

It is not a de Polignac number, because 257043882877 - 2³ = 257043882869 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 (257043882871) 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, 3134681458 + ... + 3134681539.

It is an arithmetic number, because the mean of its divisors is an integer number (65828311479).

Almost surely, 2^257043882877 is an apocalyptic number.

It is an amenable number.

257043882877 is a deficient number, since it is larger than the sum of its proper divisors (6269363039).

257043882877 is an equidigital number, since it uses as much as digits as its factorization.

257043882877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269363038.

The product of its (nonzero) digits is 42147840, while the sum is 61.

The spelling of 257043882877 in words is "two hundred fifty-seven billion, forty-three million, eight hundred eighty-two thousand, eight hundred seventy-seven".