194637428865 has 96 divisors (see below), whose sum is σ = 371809975680. Its totient is φ = 93405312000.

The previous prime is 194637428863. The next prime is 194637428911. The reversal of 194637428865 is 568824736491.

194637428865 is a `hidden beast` number, since 1 + 9 + 463 + 74 + 28 + 86 + 5 = 666.

It is not a de Polignac number, because 194637428865 - 2¹ = 194637428863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194637428863) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 97171954 + ... + 97173956.

It is an arithmetic number, because the mean of its divisors is an integer number (3873020580).

Almost surely, 2^194637428865 is an apocalyptic number.

194637428865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

194637428865 is a deficient number, since it is larger than the sum of its proper divisors (177172546815).

194637428865 is a wasteful number, since it uses less digits than its factorization.

194637428865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935 (or 3932 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 194637428865 in words is "one hundred ninety-four billion, six hundred thirty-seven million, four hundred twenty-eight thousand, eight hundred sixty-five".