1809502240461 has 16 divisors (see below), whose sum is σ = 2432159767104. Its totient is φ = 1196625798144.

The previous prime is 1809502240423. The next prime is 1809502240463. The reversal of 1809502240461 is 1640422059081.

It is not a de Polignac number, because 1809502240461 - 2²⁶ = 1809435131597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809502240463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4302286 + ... + 4704111.

It is an arithmetic number, because the mean of its divisors is an integer number (152009985444).

Almost surely, 2^{1809502240461} is an apocalyptic number.

It is an amenable number.

1809502240461 is a deficient number, since it is larger than the sum of its proper divisors (622657526643).

1809502240461 is a wasteful number, since it uses less digits than its factorization.

1809502240461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9006940.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 1809502240461 in words is "one trillion, eight hundred nine billion, five hundred two million, two hundred forty thousand, four hundred sixty-one".