198481070365493 has 4 divisors (see below), whose sum is σ = 198537505134540. Its totient is φ = 198424635596448.

The previous prime is 198481070365489. The next prime is 198481070365531. The reversal of 198481070365493 is 394563070184891.

198481070365493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 103563146853604 + 94917923511889 = 10176598^2 + 9742583^2 .

It is a cyclic number.

It is not a de Polignac number, because 198481070365493 - 2² = 198481070365489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198481070365793) 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, 28217379248 + ... + 28217386281.

It is an arithmetic number, because the mean of its divisors is an integer number (49634376283635).

Almost surely, 2^{198481070365493} is an apocalyptic number.

It is an amenable number.

198481070365493 is a deficient number, since it is larger than the sum of its proper divisors (56434769047).

198481070365493 is an equidigital number, since it uses as much as digits as its factorization.

198481070365493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56434769046.

The product of its (nonzero) digits is 156764160, while the sum is 68.

Adding to 198481070365493 its sum of digits (68), we get a square (198481070365561 = 14088331²).

The spelling of 198481070365493 in words is "one hundred ninety-eight trillion, four hundred eighty-one billion, seventy million, three hundred sixty-five thousand, four hundred ninety-three".