105851723878 has 32 divisors (see below), whose sum is σ = 172690375680. Its totient is φ = 48476556000.

The previous prime is 105851723867. The next prime is 105851723899. The reversal of 105851723878 is 878327158501.

It is a super-2 number, since 2×105851723878² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1207513 + ... + 1292203.

It is an arithmetic number, because the mean of its divisors is an integer number (5396574240).

Almost surely, 2^105851723878 is an apocalyptic number.

105851723878 is a deficient number, since it is larger than the sum of its proper divisors (66838651802).

105851723878 is a wasteful number, since it uses less digits than its factorization.

105851723878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85804.

The product of its (nonzero) digits is 3763200, while the sum is 55.

The spelling of 105851723878 in words is "one hundred five billion, eight hundred fifty-one million, seven hundred twenty-three thousand, eight hundred seventy-eight".