4354537661 has 4 divisors (see below), whose sum is σ = 4372606524. Its totient is φ = 4336468800.

The previous prime is 4354537597. The next prime is 4354537669. The reversal of 4354537661 is 1667354534.

4354537661 is digitally balanced in base 3, 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 3621752761 + 732784900 = 60181^2 + 27070^2 .

It is a cyclic number.

It is not a de Polignac number, because 4354537661 - 2⁶ = 4354537597 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 (4354537669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9034070 + ... + 9034551.

It is an arithmetic number, because the mean of its divisors is an integer number (1093151631).

Almost surely, 2^4354537661 is an apocalyptic number.

It is an amenable number.

4354537661 is a deficient number, since it is larger than the sum of its proper divisors (18068863).

4354537661 is a wasteful number, since it uses less digits than its factorization.

4354537661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18068862.

The product of its digits is 907200, while the sum is 44.

The square root of 4354537661 is about 65988.9207443189. The cubic root of 4354537661 is about 1632.9793154112.

The spelling of 4354537661 in words is "four billion, three hundred fifty-four million, five hundred thirty-seven thousand, six hundred sixty-one".