101856323563 has 8 divisors (see below), whose sum is σ = 102719588400. Its totient is φ = 100995454560.

The previous prime is 101856323549. The next prime is 101856323581. The reversal of 101856323563 is 365323658101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101856323563 - 2¹⁷ = 101856192491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101856323593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513520 + ... + 683677.

It is an arithmetic number, because the mean of its divisors is an integer number (12839948550).

Almost surely, 2^101856323563 is an apocalyptic number.

101856323563 is a deficient number, since it is larger than the sum of its proper divisors (863264837).

101856323563 is a wasteful number, since it uses less digits than its factorization.

101856323563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197917.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 101856323563 in words is "one hundred one billion, eight hundred fifty-six million, three hundred twenty-three thousand, five hundred sixty-three".