845550505 has 8 divisors (see below), whose sum is σ = 1074346632. Its totient is φ = 636649728.

The previous prime is 845550493. The next prime is 845550527. The reversal of 845550505 is 505055548.

It can be written as a sum of positive squares in 4 ways, for example, as 265559616 + 579990889 = 16296^2 + 24083^2 .

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

It is not a de Polignac number, because 845550505 - 2⁹ = 845549993 is a prime.

It is a Duffinian 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, 4973742 + ... + 4973911.

It is an arithmetic number, because the mean of its divisors is an integer number (134293329).

Almost surely, 2^845550505 is an apocalyptic number.

845550505 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

845550505 is a deficient number, since it is larger than the sum of its proper divisors (228796127).

845550505 is a wasteful number, since it uses less digits than its factorization.

845550505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947675.

The product of its (nonzero) digits is 100000, while the sum is 37.

The square root of 845550505 is about 29078.3511396365. The cubic root of 845550505 is about 945.6124562971.

The spelling of 845550505 in words is "eight hundred forty-five million, five hundred fifty thousand, five hundred five".