1809406316436 has 12 divisors (see below), whose sum is σ = 4221948071712. Its totient is φ = 603135438808.

The previous prime is 1809406316401. The next prime is 1809406316461. The reversal of 1809406316436 is 6346136049081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75391929840 + ... + 75391929863.

It is an arithmetic number, because the mean of its divisors is an integer number (351829005976).

Almost surely, 2^{1809406316436} is an apocalyptic number.

It is an amenable number.

1809406316436 is an abundant number, since it is smaller than the sum of its proper divisors (2412541755276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1809406316436 is a wasteful number, since it uses less digits than its factorization.

1809406316436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150783859710 (or 150783859708 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 1809406316436 in words is "one trillion, eight hundred nine billion, four hundred six million, three hundred sixteen thousand, four hundred thirty-six".