553745661 has 16 divisors (see below), whose sum is σ = 855364224. Its totient is φ = 312090624.

The previous prime is 553745659. The next prime is 553745669. The reversal of 553745661 is 166547355.

553745661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 553745661 - 2¹ = 553745659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553745669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179076 + ... + 182141.

It is an arithmetic number, because the mean of its divisors is an integer number (53460264).

Almost surely, 2^553745661 is an apocalyptic number.

It is an amenable number.

553745661 is a deficient number, since it is larger than the sum of its proper divisors (301618563).

553745661 is a wasteful number, since it uses less digits than its factorization.

553745661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361300.

The product of its digits is 378000, while the sum is 42.

The square root of 553745661 is about 23531.8010572927. The cubic root of 553745661 is about 821.1770034899.

The spelling of 553745661 in words is "five hundred fifty-three million, seven hundred forty-five thousand, six hundred sixty-one".