809532549389 has 4 divisors (see below), whose sum is σ = 810911651424. Its totient is φ = 808153447356.

The previous prime is 809532549383. The next prime is 809532549391. The reversal of 809532549389 is 983945235908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 809532549389 - 2¹⁶ = 809532483853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809532549383) 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, 689550137 + ... + 689551310.

It is an arithmetic number, because the mean of its divisors is an integer number (202727912856).

Almost surely, 2^809532549389 is an apocalyptic number.

It is an amenable number.

809532549389 is a deficient number, since it is larger than the sum of its proper divisors (1379102035).

809532549389 is a wasteful number, since it uses less digits than its factorization.

809532549389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379102034.

The product of its (nonzero) digits is 83980800, while the sum is 65.

The spelling of 809532549389 in words is "eight hundred nine billion, five hundred thirty-two million, five hundred forty-nine thousand, three hundred eighty-nine".