1816009423656 has 16 divisors (see below), whose sum is σ = 4540023559200. Its totient is φ = 605336474544.

The previous prime is 1816009423651. The next prime is 1816009423673. The reversal of 1816009423656 is 6563249006181.

It is a junction number, because it is equal to n+sod(n) for n = 1816009423599 and 1816009423608.

It is not an unprimeable number, because it can be changed into a prime (1816009423651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37833529636 + ... + 37833529683.

It is an arithmetic number, because the mean of its divisors is an integer number (283751472450).

Almost surely, 2^{1816009423656} is an apocalyptic number.

It is an amenable number.

1816009423656 is an abundant number, since it is smaller than the sum of its proper divisors (2724014135544).

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

1816009423656 is a wasteful number, since it uses less digits than its factorization.

1816009423656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75667059328 (or 75667059324 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 1816009423656 in words is "one trillion, eight hundred sixteen billion, nine million, four hundred twenty-three thousand, six hundred fifty-six".