6513645 has 8 divisors (see below), whose sum is σ = 10421856. Its totient is φ = 3473936.

The previous prime is 6513613. The next prime is 6513649. The reversal of 6513645 is 5463156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6513645 - 2⁵ = 6513613 is a prime.

It is a super-3 number, since 3×6513645³ (a number of 21 digits) contains 333 as substring.

6513645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6513649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217107 + ... + 217136.

It is an arithmetic number, because the mean of its divisors is an integer number (1302732).

Almost surely, 2^6513645 is an apocalyptic number.

It is an amenable number.

6513645 is a deficient number, since it is larger than the sum of its proper divisors (3908211).

6513645 is a wasteful number, since it uses less digits than its factorization.

6513645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434251.

The product of its digits is 10800, while the sum is 30.

The square root of 6513645 is about 2552.1843585447. The cubic root of 6513645 is about 186.7560566055.

The spelling of 6513645 in words is "six million, five hundred thirteen thousand, six hundred forty-five".