553661345 has 4 divisors (see below), whose sum is σ = 664393620. Its totient is φ = 442929072.

The previous prime is 553661341. The next prime is 553661347. The reversal of 553661345 is 543166355.

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 136235584 + 417425761 = 11672^2 + 20431^2 .

It is a cyclic number.

It is not a de Polignac number, because 553661345 - 2² = 553661341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 553661299 and 553661308.

It is not an unprimeable number, because it can be changed into a prime (553661341) 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, 55366130 + ... + 55366139.

It is an arithmetic number, because the mean of its divisors is an integer number (166098405).

Almost surely, 2^553661345 is an apocalyptic number.

It is an amenable number.

553661345 is a deficient number, since it is larger than the sum of its proper divisors (110732275).

553661345 is a wasteful number, since it uses less digits than its factorization.

553661345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110732274.

The product of its digits is 162000, while the sum is 38.

The square root of 553661345 is about 23530.0094560117. The cubic root of 553661345 is about 821.1353225766.

The spelling of 553661345 in words is "five hundred fifty-three million, six hundred sixty-one thousand, three hundred forty-five".