100194238685 has 4 divisors (see below), whose sum is σ = 120233086428. Its totient is φ = 80155390944.

The previous prime is 100194238633. The next prime is 100194238723. The reversal of 100194238685 is 586832491001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39322493401 + 60871745284 = 198299^2 + 246722^2 .

It is a cyclic number.

It is not a de Polignac number, because 100194238685 - 2¹² = 100194234589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10019423864 + ... + 10019423873.

It is an arithmetic number, because the mean of its divisors is an integer number (30058271607).

Almost surely, 2^100194238685 is an apocalyptic number.

It is an amenable number.

100194238685 is a deficient number, since it is larger than the sum of its proper divisors (20038847743).

100194238685 is an equidigital number, since it uses as much as digits as its factorization.

100194238685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20038847742.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 100194238685 in words is "one hundred billion, one hundred ninety-four million, two hundred thirty-eight thousand, six hundred eighty-five".