275198645 has 4 divisors (see below), whose sum is σ = 330238380. Its totient is φ = 220158912.

The previous prime is 275198629. The next prime is 275198647. The reversal of 275198645 is 546891572.

It is a happy number.

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 116791249 + 158407396 = 10807^2 + 12586^2 .

It is a cyclic number.

It is not a de Polignac number, because 275198645 - 2⁴ = 275198629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 275198645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275198647) 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, 27519860 + ... + 27519869.

It is an arithmetic number, because the mean of its divisors is an integer number (82559595).

Almost surely, 2^275198645 is an apocalyptic number.

It is an amenable number.

275198645 is a deficient number, since it is larger than the sum of its proper divisors (55039735).

275198645 is an equidigital number, since it uses as much as digits as its factorization.

275198645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55039734.

The product of its digits is 604800, while the sum is 47.

The square root of 275198645 is about 16589.1122426729. The cubic root of 275198645 is about 650.4522651260.

The spelling of 275198645 in words is "two hundred seventy-five million, one hundred ninety-eight thousand, six hundred forty-five".