268915663 has 2 divisors, whose sum is σ = 268915664. Its totient is φ = 268915662.

The previous prime is 268915657. The next prime is 268915681. The reversal of 268915663 is 366519862.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268915663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268915613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134457831 + 134457832.

It is an arithmetic number, because the mean of its divisors is an integer number (134457832).

Almost surely, 2^268915663 is an apocalyptic number.

268915663 is a deficient number, since it is larger than the sum of its proper divisors (1).

268915663 is an equidigital number, since it uses as much as digits as its factorization.

268915663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 46.

The square root of 268915663 is about 16398.6482064834. The cubic root of 268915663 is about 645.4640116031.

The spelling of 268915663 in words is "two hundred sixty-eight million, nine hundred fifteen thousand, six hundred sixty-three".