257947811260 has 12 divisors (see below), whose sum is σ = 541690403688. Its totient is φ = 103179124496.

The previous prime is 257947811257. The next prime is 257947811263. The reversal of 257947811260 is 62118749752.

It is an interprime number because it is at equal distance from previous prime (257947811257) and next prime (257947811263).

It is a junction number, because it is equal to n+sod(n) for n = 257947811198 and 257947811207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257947811263) 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, 6448695262 + ... + 6448695301.

It is an arithmetic number, because the mean of its divisors is an integer number (45140866974).

Almost surely, 2^257947811260 is an apocalyptic number.

257947811260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257947811260 is an abundant number, since it is smaller than the sum of its proper divisors (283742592428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257947811260 is a wasteful number, since it uses less digits than its factorization.

257947811260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12897390572 (or 12897390570 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 257947811260 in words is "two hundred fifty-seven billion, nine hundred forty-seven million, eight hundred eleven thousand, two hundred sixty".