268520786531 has 2 divisors, whose sum is σ = 268520786532. Its totient is φ = 268520786530.

The previous prime is 268520786503. The next prime is 268520786537. The reversal of 268520786531 is 135687025862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268520786531 - 2³⁰ = 267447044707 is a prime.

It is a super-2 number, since 2×268520786531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (268520786537) 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, 134260393265 + 134260393266.

It is an arithmetic number, because the mean of its divisors is an integer number (134260393266).

Almost surely, 2^268520786531 is an apocalyptic number.

268520786531 is a deficient number, since it is larger than the sum of its proper divisors (1).

268520786531 is an equidigital number, since it uses as much as digits as its factorization.

268520786531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 268520786531 in words is "two hundred sixty-eight billion, five hundred twenty million, seven hundred eighty-six thousand, five hundred thirty-one".