268571681 has 4 divisors (see below), whose sum is σ = 306939072. Its totient is φ = 230204292.

The previous prime is 268571671. The next prime is 268571683. The reversal of 268571681 is 186175862.

It is a happy number.

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 268571681 - 2¹⁴ = 268555297 is a prime.

It is a super-2 number, since 2×268571681² = 144261495670331522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268571683) 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, 19183685 + ... + 19183698.

It is an arithmetic number, because the mean of its divisors is an integer number (76734768).

Almost surely, 2^268571681 is an apocalyptic number.

It is an amenable number.

268571681 is a deficient number, since it is larger than the sum of its proper divisors (38367391).

268571681 is an equidigital number, since it uses as much as digits as its factorization.

268571681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38367390.

The product of its digits is 161280, while the sum is 44.

The square root of 268571681 is about 16388.1567297851. The cubic root of 268571681 is about 645.1886802530.

The spelling of 268571681 in words is "two hundred sixty-eight million, five hundred seventy-one thousand, six hundred eighty-one".