268378157 has 2 divisors, whose sum is σ = 268378158. Its totient is φ = 268378156.

The previous prime is 268378147. The next prime is 268378171. The reversal of 268378157 is 751873862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248566756 + 19811401 = 15766^2 + 4451^2 .

It is a cyclic number.

It is not a de Polignac number, because 268378157 - 2⁴ = 268378141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268378147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134189078 + 134189079.

It is an arithmetic number, because the mean of its divisors is an integer number (134189079).

Almost surely, 2^268378157 is an apocalyptic number.

It is an amenable number.

268378157 is a deficient number, since it is larger than the sum of its proper divisors (1).

268378157 is an equidigital number, since it uses as much as digits as its factorization.

268378157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 268378157 is about 16382.2512799676. The cubic root of 268378157 is about 645.0336757050.

The spelling of 268378157 in words is "two hundred sixty-eight million, three hundred seventy-eight thousand, one hundred fifty-seven".