268710815869 has 2 divisors, whose sum is σ = 268710815870. Its totient is φ = 268710815868.

The previous prime is 268710815803. The next prime is 268710815897. The reversal of 268710815869 is 968518017862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242027593369 + 26683222500 = 491963^2 + 163350^2 .

It is a cyclic number.

It is not a de Polignac number, because 268710815869 - 2³⁵ = 234351077501 is a prime.

It is a super-2 number, since 2×268710815869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268710815369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134355407934 + 134355407935.

It is an arithmetic number, because the mean of its divisors is an integer number (134355407935).

Almost surely, 2^268710815869 is an apocalyptic number.

It is an amenable number.

268710815869 is a deficient number, since it is larger than the sum of its proper divisors (1).

268710815869 is an equidigital number, since it uses as much as digits as its factorization.

268710815869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 268710815869 in words is "two hundred sixty-eight billion, seven hundred ten million, eight hundred fifteen thousand, eight hundred sixty-nine".