5631645 has 8 divisors (see below), whose sum is σ = 9010656. Its totient is φ = 3003536.

The previous prime is 5631629. The next prime is 5631671. The reversal of 5631645 is 5461365.

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 5631645 - 2⁴ = 5631629 is a prime.

5631645 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187707 + ... + 187736.

It is an arithmetic number, because the mean of its divisors is an integer number (1126332).

Almost surely, 2^5631645 is an apocalyptic number.

It is an amenable number.

5631645 is a deficient number, since it is larger than the sum of its proper divisors (3379011).

5631645 is a wasteful number, since it uses less digits than its factorization.

5631645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375451.

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

The square root of 5631645 is about 2373.1087206447. The cubic root of 5631645 is about 177.9146689429.

The spelling of 5631645 in words is "five million, six hundred thirty-one thousand, six hundred forty-five".