1268518730658 has 8 divisors (see below), whose sum is σ = 2537037461328. Its totient is φ = 422839576884.

The previous prime is 1268518730657. The next prime is 1268518730749. The reversal of 1268518730658 is 8560378158621.

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

1268518730658 is an admirable number.

It is a super-2 number, since 2×1268518730658² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1268518730657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105709894216 + ... + 105709894227.

It is an arithmetic number, because the mean of its divisors is an integer number (317129682666).

Almost surely, 2^{1268518730658} is an apocalyptic number.

1268518730658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268518730658 is a wasteful number, since it uses less digits than its factorization.

1268518730658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211419788448.

The product of its (nonzero) digits is 19353600, while the sum is 60.

The spelling of 1268518730658 in words is "one trillion, two hundred sixty-eight billion, five hundred eighteen million, seven hundred thirty thousand, six hundred fifty-eight".