1816697244564 has 84 divisors (see below), whose sum is σ = 4767246747060. Its totient is φ = 605489904000.

The previous prime is 1816697244437. The next prime is 1816697244577. The reversal of 1816697244564 is 4654427966181.

1816697244564 is a `hidden beast` number, since 1 + 8 + 1 + 6 + 69 + 7 + 2 + 4 + 4 + 564 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 963032120964 + 853665123600 = 981342^2 + 923940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 26294064 + ... + 26363064.

It is an arithmetic number, because the mean of its divisors is an integer number (56752937465).

Almost surely, 2^{1816697244564} is an apocalyptic number.

It is an amenable number.

1816697244564 is an abundant number, since it is smaller than the sum of its proper divisors (2950549502496).

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

1816697244564 is an equidigital number, since it uses as much as digits as its factorization.

1816697244564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78052 (or 78035 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 1816697244564 in words is "one trillion, eight hundred sixteen billion, six hundred ninety-seven million, two hundred forty-four thousand, five hundred sixty-four".