6545605403 has 4 divisors (see below), whose sum is σ = 6555332088. Its totient is φ = 6535878720.

The previous prime is 6545605373. The next prime is 6545605411. The reversal of 6545605403 is 3045065456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6545605403 - 2²² = 6541411099 is a prime.

It is a super-3 number, since 3×6545605403³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6545605463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4862333 + ... + 4863678.

It is an arithmetic number, because the mean of its divisors is an integer number (1638833022).

Almost surely, 2^6545605403 is an apocalyptic number.

6545605403 is a deficient number, since it is larger than the sum of its proper divisors (9726685).

6545605403 is an equidigital number, since it uses as much as digits as its factorization.

6545605403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9726684.

The product of its (nonzero) digits is 216000, while the sum is 38.

The square root of 6545605403 is about 80904.9158148008. The cubic root of 6545605403 is about 1870.6100941451.

The spelling of 6545605403 in words is "six billion, five hundred forty-five million, six hundred five thousand, four hundred three".