1369866590569 has 9 divisors (see below), whose sum is σ = 1375640981949. Its totient is φ = 1364116351500.

The previous prime is 1369866590461. The next prime is 1369866590597. The reversal of 1369866590569 is 9650956689631.

The square root of 1369866590569 is 1170413.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1369866590569 - 2¹⁹ = 1369866066281 is a prime.

It is a super-2 number, since 2×1369866590569² (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 (1369866590269) 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 8 ways as a sum of consecutive naturals, for example, 293771332 + ... + 293775994.

Almost surely, 2^{1369866590569} is an apocalyptic number.

1369866590569 is the 1170413-rd square number.

1369866590569 is the 585207-th centered octagonal number.

It is an amenable number.

1369866590569 is a deficient number, since it is larger than the sum of its proper divisors (5774391380).

1369866590569 is an frugal number, since it uses more digits than its factorization.

1369866590569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9828 (or 4914 counting only the distinct ones).

The product of its (nonzero) digits is 566870400, while the sum is 73.

The spelling of 1369866590569 in words is "one trillion, three hundred sixty-nine billion, eight hundred sixty-six million, five hundred ninety thousand, five hundred sixty-nine".