1268672768621 has 8 divisors (see below), whose sum is σ = 1325414367000. Its totient is φ = 1212797454400.

The previous prime is 1268672768617. The next prime is 1268672768663.

1268672768621 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 983181318025 + 285491450596 = 991555^2 + 534314^2 .

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 1268672768621 - 2² = 1268672768617 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 (1268672768611) 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, 216568046 + ... + 216573903.

It is an arithmetic number, because the mean of its divisors is an integer number (165676795875).

Almost surely, 2^{1268672768621} is an apocalyptic number.

It is an amenable number.

1268672768621 is a deficient number, since it is larger than the sum of its proper divisors (56741598379).

1268672768621 is a wasteful number, since it uses less digits than its factorization.

1268672768621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433142079.

The product of its digits is 32514048, while the sum is 62.

The spelling of 1268672768621 in words is "one trillion, two hundred sixty-eight billion, six hundred seventy-two million, seven hundred sixty-eight thousand, six hundred twenty-one".