257743514623 has 6 divisors (see below), whose sum is σ = 299824088496. Its totient is φ = 220923012492.

The previous prime is 257743514617. The next prime is 257743514627. The reversal of 257743514623 is 326415347752.

It is a de Polignac number, because none of the positive numbers 2^k-257743514623 is a prime.

It is a super-2 number, since 2×257743514623² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 5260071727 = 257743514623 / (2 + 5 + 7 + 7 + 4 + 3 + 5 + 1 + 4 + 6 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257743514627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2630035815 + ... + 2630035912.

It is an arithmetic number, because the mean of its divisors is an integer number (49970681416).

Almost surely, 2^257743514623 is an apocalyptic number.

257743514623 is a deficient number, since it is larger than the sum of its proper divisors (42080573873).

257743514623 is an equidigital number, since it uses as much as digits as its factorization.

257743514623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260071741 (or 5260071734 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 49.

The spelling of 257743514623 in words is "two hundred fifty-seven billion, seven hundred forty-three million, five hundred fourteen thousand, six hundred twenty-three".