56641645 has 8 divisors (see below), whose sum is σ = 68027904. Its totient is φ = 45274704.

The previous prime is 56641643. The next prime is 56641661. The reversal of 56641645 is 54614665.

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 56641645 - 2¹ = 56641643 is a prime.

It is a super-3 number, since 3×56641645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56641643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2692 + ... + 10978.

It is an arithmetic number, because the mean of its divisors is an integer number (8503488).

Almost surely, 2^56641645 is an apocalyptic number.

It is an amenable number.

56641645 is a deficient number, since it is larger than the sum of its proper divisors (11386259).

56641645 is a wasteful number, since it uses less digits than its factorization.

56641645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9659.

The product of its digits is 86400, while the sum is 37.

The square root of 56641645 is about 7526.0643765517. The cubic root of 56641645 is about 384.0419084939.

The spelling of 56641645 in words is "fifty-six million, six hundred forty-one thousand, six hundred forty-five".