105855580785 has 16 divisors (see below), whose sum is σ = 169373980800. Its totient is φ = 56454625920.

The previous prime is 105855580781. The next prime is 105855580813. The reversal of 105855580785 is 587085558501.

It is a happy number.

It is not a de Polignac number, because 105855580785 - 2² = 105855580781 is a prime.

It is a super-2 number, since 2×105855580785² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105855580781) 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, 543420 + ... + 712050.

It is an arithmetic number, because the mean of its divisors is an integer number (10585873800).

Almost surely, 2^105855580785 is an apocalyptic number.

105855580785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

105855580785 is a deficient number, since it is larger than the sum of its proper divisors (63518400015).

105855580785 is a wasteful number, since it uses less digits than its factorization.

105855580785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210488.

The product of its (nonzero) digits is 11200000, while the sum is 57.

The spelling of 105855580785 in words is "one hundred five billion, eight hundred fifty-five million, five hundred eighty thousand, seven hundred eighty-five".