194628941721 has 24 divisors (see below), whose sum is σ = 291585490560. Its totient is φ = 129733691472.

The previous prime is 194628941669. The next prime is 194628941779. The reversal of 194628941721 is 127149826491.

194628941721 is a `hidden beast` number, since 1 + 9 + 4 + 628 + 9 + 4 + 1 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 194628941721 - 2¹³ = 194628933529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194628941821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1721296 + ... + 1830878.

It is an arithmetic number, because the mean of its divisors is an integer number (12149395440).

Almost surely, 2^194628941721 is an apocalyptic number.

It is an amenable number.

194628941721 is a deficient number, since it is larger than the sum of its proper divisors (96956548839).

194628941721 is an equidigital number, since it uses as much as digits as its factorization.

194628941721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116907 (or 116895 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 194628941721 in words is "one hundred ninety-four billion, six hundred twenty-eight million, nine hundred forty-one thousand, seven hundred twenty-one".