194098381537 has 4 divisors (see below), whose sum is σ = 194107358980. Its totient is φ = 194089404096.

The previous prime is 194098381487. The next prime is 194098381559. The reversal of 194098381537 is 735183890491.

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 186797704401 + 7300677136 = 432201^2 + 85444^2 .

It is a cyclic number.

It is not a de Polignac number, because 194098381537 - 2⁷ = 194098381409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194098351537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4456212 + ... + 4499557.

It is an arithmetic number, because the mean of its divisors is an integer number (48526839745).

Almost surely, 2^194098381537 is an apocalyptic number.

It is an amenable number.

194098381537 is a deficient number, since it is larger than the sum of its proper divisors (8977443).

194098381537 is an equidigital number, since it uses as much as digits as its factorization.

194098381537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8977442.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 194098381537 in words is "one hundred ninety-four billion, ninety-eight million, three hundred eighty-one thousand, five hundred thirty-seven".