1356891355669 has 4 divisors (see below), whose sum is σ = 1370879926444. Its totient is φ = 1342902784896.

The previous prime is 1356891355667. The next prime is 1356891355717. The reversal of 1356891355669 is 9665531986531.

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 541897682769 + 814993672900 = 736137^2 + 902770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356891355669 - 2¹ = 1356891355667 is a prime.

It is a super-2 number, since 2×1356891355669² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356891355667) 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, 6994285242 + ... + 6994285435.

It is an arithmetic number, because the mean of its divisors is an integer number (342719981611).

Almost surely, 2^{1356891355669} is an apocalyptic number.

It is an amenable number.

1356891355669 is a deficient number, since it is larger than the sum of its proper divisors (13988570775).

1356891355669 is an equidigital number, since it uses as much as digits as its factorization.

1356891355669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13988570774.

The product of its digits is 157464000, while the sum is 67.

The spelling of 1356891355669 in words is "one trillion, three hundred fifty-six billion, eight hundred ninety-one million, three hundred fifty-five thousand, six hundred sixty-nine".