1356433536809 has 8 divisors (see below), whose sum is σ = 1460793251400. Its totient is φ = 1252076489856.

The previous prime is 1356433536803. The next prime is 1356433536851. The reversal of 1356433536809 is 9086353346531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14478105625 + 1341955431184 = 120325^2 + 1158428^2 .

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 1356433536809 - 2²⁸ = 1356165101353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356433536803) 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, 459659 + ... + 1710015.

It is an arithmetic number, because the mean of its divisors is an integer number (182599156425).

Almost surely, 2^{1356433536809} is an apocalyptic number.

It is an amenable number.

1356433536809 is a deficient number, since it is larger than the sum of its proper divisors (104359714591).

1356433536809 is a wasteful number, since it uses less digits than its factorization.

1356433536809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333819.

The product of its (nonzero) digits is 20995200, while the sum is 56.

The spelling of 1356433536809 in words is "one trillion, three hundred fifty-six billion, four hundred thirty-three million, five hundred thirty-six thousand, eight hundred nine".