1268242719557 has 8 divisors (see below), whose sum is σ = 1385222707872. Its totient is φ = 1151543597200.

The previous prime is 1268242719553. The next prime is 1268242719563. The reversal of 1268242719557 is 7559172428621.

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

It is a cyclic number.

It is not a de Polignac number, because 1268242719557 - 2² = 1268242719553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1268242719496 and 1268242719505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268242719553) 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, 70207043 + ... + 70225104.

It is an arithmetic number, because the mean of its divisors is an integer number (173152838484).

Almost surely, 2^{1268242719557} is an apocalyptic number.

It is an amenable number.

1268242719557 is a deficient number, since it is larger than the sum of its proper divisors (116979988315).

1268242719557 is a wasteful number, since it uses less digits than its factorization.

1268242719557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140432979.

The product of its digits is 16934400, while the sum is 59.

The spelling of 1268242719557 in words is "one trillion, two hundred sixty-eight billion, two hundred forty-two million, seven hundred nineteen thousand, five hundred fifty-seven".