268131124109 has 2 divisors, whose sum is σ = 268131124110. Its totient is φ = 268131124108.

The previous prime is 268131124097. The next prime is 268131124169. The reversal of 268131124109 is 901421131862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246581764900 + 21549359209 = 496570^2 + 146797^2 .

It is a cyclic number.

It is not a de Polignac number, because 268131124109 - 2¹² = 268131120013 is a prime.

It is a super-2 number, since 2×268131124109² (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 (268131124169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134065562054 + 134065562055.

It is an arithmetic number, because the mean of its divisors is an integer number (134065562055).

Almost surely, 2^268131124109 is an apocalyptic number.

It is an amenable number.

268131124109 is a deficient number, since it is larger than the sum of its proper divisors (1).

268131124109 is an equidigital number, since it uses as much as digits as its factorization.

268131124109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 268131124109 in words is "two hundred sixty-eight billion, one hundred thirty-one million, one hundred twenty-four thousand, one hundred nine".