257811641855 has 16 divisors (see below), whose sum is σ = 315168796800. Its totient is φ = 202398345120.

The previous prime is 257811641833. The next prime is 257811641861. The reversal of 257811641855 is 558146118752.

It is not a de Polignac number, because 257811641855 - 2⁸ = 257811641599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257811641797 and 257811641806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596825 + ... + 933714.

It is an arithmetic number, because the mean of its divisors is an integer number (19698049800).

Almost surely, 2^257811641855 is an apocalyptic number.

257811641855 is a deficient number, since it is larger than the sum of its proper divisors (57357154945).

257811641855 is a wasteful number, since it uses less digits than its factorization.

257811641855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531174.

The product of its digits is 2688000, while the sum is 53.

The spelling of 257811641855 in words is "two hundred fifty-seven billion, eight hundred eleven million, six hundred forty-one thousand, eight hundred fifty-five".