257135682677 has 4 divisors (see below), whose sum is σ = 270669139680. Its totient is φ = 243602225676.

The previous prime is 257135682667. The next prime is 257135682707. The reversal of 257135682677 is 776286531752.

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 257135682677 - 2⁸ = 257135682421 is a prime.

It is a super-2 number, since 2×257135682677² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257135682607) 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, 6766728473 + ... + 6766728510.

It is an arithmetic number, because the mean of its divisors is an integer number (67667284920).

Almost surely, 2^257135682677 is an apocalyptic number.

It is an amenable number.

257135682677 is a deficient number, since it is larger than the sum of its proper divisors (13533457003).

257135682677 is a wasteful number, since it uses less digits than its factorization.

257135682677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13533457002.

The product of its digits is 29635200, while the sum is 59.

The spelling of 257135682677 in words is "two hundred fifty-seven billion, one hundred thirty-five million, six hundred eighty-two thousand, six hundred seventy-seven".