268191863 has 8 divisors (see below), whose sum is σ = 270169536. Its totient is φ = 266220000.

The previous prime is 268191839. The next prime is 268191871. The reversal of 268191863 is 368191862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268191863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268191893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134945 + ... + 136917.

It is an arithmetic number, because the mean of its divisors is an integer number (33771192).

Almost surely, 2^268191863 is an apocalyptic number.

268191863 is a deficient number, since it is larger than the sum of its proper divisors (1977673).

268191863 is a wasteful number, since it uses less digits than its factorization.

268191863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905.

The product of its digits is 124416, while the sum is 44.

The square root of 268191863 is about 16376.5644443516. The cubic root of 268191863 is about 644.8843916750.

Subtracting 268191863 from its reverse (368191862), we obtain a palindrome (99999999).

It can be divided in two parts, 26819 and 1863, that added together give a palindrome (28682).

The spelling of 268191863 in words is "two hundred sixty-eight million, one hundred ninety-one thousand, eight hundred sixty-three".