105921789804 has 24 divisors (see below), whose sum is σ = 274612047920. Its totient is φ = 35307263232.

The previous prime is 105921789781. The next prime is 105921789839. The reversal of 105921789804 is 408987129501.

It is a happy number.

It is a super-4 number, since 4×105921789804⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490378549 + ... + 490378764.

Almost surely, 2^105921789804 is an apocalyptic number.

It is an amenable number.

105921789804 is an abundant number, since it is smaller than the sum of its proper divisors (168690258116).

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

105921789804 is a wasteful number, since it uses less digits than its factorization.

105921789804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980757326 (or 980757318 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 105921789804 in words is "one hundred five billion, nine hundred twenty-one million, seven hundred eighty-nine thousand, eight hundred four".