268402655 has 4 divisors (see below), whose sum is σ = 322083192. Its totient is φ = 214722120.

The previous prime is 268402633. The next prime is 268402657. The reversal of 268402655 is 556204862.

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

It is not a de Polignac number, because 268402655 - 2¹⁸ = 268140511 is a prime.

It is a super-2 number, since 2×268402655² = 144079970422098050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268402657) 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, 26840261 + ... + 26840270.

It is an arithmetic number, because the mean of its divisors is an integer number (80520798).

Almost surely, 2^268402655 is an apocalyptic number.

268402655 is a deficient number, since it is larger than the sum of its proper divisors (53680537).

268402655 is an equidigital number, since it uses as much as digits as its factorization.

268402655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53680536.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 268402655 is about 16382.9989623390. The cubic root of 268402655 is about 645.0533016865.

The spelling of 268402655 in words is "two hundred sixty-eight million, four hundred two thousand, six hundred fifty-five".