257651227611263 has 4 divisors (see below), whose sum is σ = 257668922236608. Its totient is φ = 257633532985920.

The previous prime is 257651227611259. The next prime is 257651227611269. The reversal of 257651227611263 is 362116722156752.

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

It is a cyclic number.

It is not a de Polignac number, because 257651227611263 - 2² = 257651227611259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257651227611199 and 257651227611208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257651227611269) 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, 8847290831 + ... + 8847319952.

It is an arithmetic number, because the mean of its divisors is an integer number (64417230559152).

Almost surely, 2^{257651227611263} is an apocalyptic number.

257651227611263 is a deficient number, since it is larger than the sum of its proper divisors (17694625345).

257651227611263 is a wasteful number, since it uses less digits than its factorization.

257651227611263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17694625344.

The product of its digits is 12700800, while the sum is 56.

The spelling of 257651227611263 in words is "two hundred fifty-seven trillion, six hundred fifty-one billion, two hundred twenty-seven million, six hundred eleven thousand, two hundred sixty-three".