7645645 has 8 divisors (see below), whose sum is σ = 10485504. Its totient is φ = 5242704.

The previous prime is 7645607. The next prime is 7645661. The reversal of 7645645 is 5465467.

It is a happy number.

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 7645645 - 2¹⁹ = 7121357 is a prime.

It is a super-3 number, since 3×7645645³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 109189 + ... + 109258.

It is an arithmetic number, because the mean of its divisors is an integer number (1310688).

Almost surely, 2^7645645 is an apocalyptic number.

It is an amenable number.

7645645 is a deficient number, since it is larger than the sum of its proper divisors (2839859).

7645645 is a wasteful number, since it uses less digits than its factorization.

7645645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218459.

The product of its digits is 100800, while the sum is 37.

The square root of 7645645 is about 2765.0759483240. The cubic root of 7645645 is about 197.0023362001.

The spelling of 7645645 in words is "seven million, six hundred forty-five thousand, six hundred forty-five".