6553645 has 16 divisors (see below), whose sum is σ = 9209088. Its totient is φ = 4383360.

The previous prime is 6553621. The next prime is 6553663. The reversal of 6553645 is 5463556.

It is a de Polignac number, because none of the positive numbers 2^k-6553645 is a prime.

It is a super-3 number, since 3×6553645³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6553645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849 + ... + 3718.

It is an arithmetic number, because the mean of its divisors is an integer number (575568).

Almost surely, 2^6553645 is an apocalyptic number.

It is an amenable number.

6553645 is a deficient number, since it is larger than the sum of its proper divisors (2655443).

6553645 is a wasteful number, since it uses less digits than its factorization.

6553645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620.

The product of its digits is 54000, while the sum is 34.

The square root of 6553645 is about 2560.0087890474. The cubic root of 6553645 is about 187.1375635676.

The spelling of 6553645 in words is "six million, five hundred fifty-three thousand, six hundred forty-five".