55001645 has 8 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 43973200.

The previous prime is 55001627. The next prime is 55001659. The reversal of 55001645 is 54610055.

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

It is not a de Polignac number, because 55001645 - 2²⁰ = 53953069 is a prime.

It is a super-3 number, since 3×55001645³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

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, 9416 + ... + 14094.

It is an arithmetic number, because the mean of its divisors is an integer number (8255520).

Almost surely, 2^55001645 is an apocalyptic number.

It is an amenable number.

55001645 is a deficient number, since it is larger than the sum of its proper divisors (11042515).

55001645 is a wasteful number, since it uses less digits than its factorization.

55001645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 55001645 is about 7416.3093921438. The cubic root of 55001645 is about 380.2990374667.

The spelling of 55001645 in words is "fifty-five million, one thousand, six hundred forty-five".