10198174985 has 4 divisors (see below), whose sum is σ = 12237809988. Its totient is φ = 8158539984.

The previous prime is 10198174981. The next prime is 10198174993. The reversal of 10198174985 is 58947189101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58947189101 = 37 ⋅1593167273.

It can be written as a sum of positive squares in 2 ways, for example, as 6142013641 + 4056161344 = 78371^2 + 63688^2 .

It is a cyclic number.

It is not a de Polignac number, because 10198174985 - 2² = 10198174981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10198174981) 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, 1019817494 + ... + 1019817503.

It is an arithmetic number, because the mean of its divisors is an integer number (3059452497).

Almost surely, 2^10198174985 is an apocalyptic number.

It is an amenable number.

10198174985 is a deficient number, since it is larger than the sum of its proper divisors (2039635003).

10198174985 is an equidigital number, since it uses as much as digits as its factorization.

10198174985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039635002.

The product of its (nonzero) digits is 725760, while the sum is 53.

The spelling of 10198174985 in words is "ten billion, one hundred ninety-eight million, one hundred seventy-four thousand, nine hundred eighty-five".