1368766356481 has 4 divisors (see below), whose sum is σ = 1381323846100. Its totient is φ = 1356208866864.

The previous prime is 1368766356457. The next prime is 1368766356497. The reversal of 1368766356481 is 1846536678631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1092006190081 + 276760166400 = 1044991^2 + 526080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368766356481 - 2⁵ = 1368766356449 is a prime.

It is a super-2 number, since 2×1368766356481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368766356421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6278744646 + ... + 6278744863.

It is an arithmetic number, because the mean of its divisors is an integer number (345330961525).

Almost surely, 2^{1368766356481} is an apocalyptic number.

It is an amenable number.

1368766356481 is a deficient number, since it is larger than the sum of its proper divisors (12557489619).

1368766356481 is a wasteful number, since it uses less digits than its factorization.

1368766356481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12557489618.

The product of its digits is 104509440, while the sum is 64.

The spelling of 1368766356481 in words is "one trillion, three hundred sixty-eight billion, seven hundred sixty-six million, three hundred fifty-six thousand, four hundred eighty-one".