55643615 has 8 divisors (see below), whose sum is σ = 67577328. Its totient is φ = 43978240.

The previous prime is 55643611. The next prime is 55643633. The reversal of 55643615 is 51634655.

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

It is not a de Polignac number, because 55643615 - 2² = 55643611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55643611) 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, 66626 + ... + 67455.

It is an arithmetic number, because the mean of its divisors is an integer number (8447166).

Almost surely, 2^55643615 is an apocalyptic number.

55643615 is a deficient number, since it is larger than the sum of its proper divisors (11933713).

55643615 is a wasteful number, since it uses less digits than its factorization.

55643615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134169.

The product of its digits is 54000, while the sum is 35.

The square root of 55643615 is about 7459.4647931336. The cubic root of 55643615 is about 381.7729135589.

The spelling of 55643615 in words is "fifty-five million, six hundred forty-three thousand, six hundred fifteen".