1369543561 has 8 divisors (see below), whose sum is σ = 1380852000. Its totient is φ = 1358248320.

The previous prime is 1369543501. The next prime is 1369543603. The reversal of 1369543561 is 1653459631.

It is a happy number.

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 1369543561 - 2⁷ = 1369543433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1369543501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413490 + ... + 416788.

It is an arithmetic number, because the mean of its divisors is an integer number (172606500).

Almost surely, 2^1369543561 is an apocalyptic number.

It is an amenable number.

1369543561 is a deficient number, since it is larger than the sum of its proper divisors (11308439).

1369543561 is a wasteful number, since it uses less digits than its factorization.

1369543561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6599.

The product of its digits is 291600, while the sum is 43.

The square root of 1369543561 is about 37007.3446899396. The cubic root of 1369543561 is about 1110.5171847937.

The spelling of 1369543561 in words is "one billion, three hundred sixty-nine million, five hundred forty-three thousand, five hundred sixty-one".