1809235364497 has 32 divisors (see below), whose sum is σ = 2057531704704. Its totient is φ = 1576496332800.

The previous prime is 1809235364459. The next prime is 1809235364539. The reversal of 1809235364497 is 7944635329081.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1809235364497 - 2²³ = 1809226975889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1809235364597) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8354298 + ... + 8568124.

It is an arithmetic number, because the mean of its divisors is an integer number (64297865772).

It is a 1-persistent number, because it is pandigital, but 2⋅1809235364497 = 3618470728994 is not.

Almost surely, 2^{1809235364497} is an apocalyptic number.

It is an amenable number.

1809235364497 is a deficient number, since it is larger than the sum of its proper divisors (248296340207).

1809235364497 is a wasteful number, since it uses less digits than its factorization.

1809235364497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214209.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 1809235364497 in words is "one trillion, eight hundred nine billion, two hundred thirty-five million, three hundred sixty-four thousand, four hundred ninety-seven".