808172145 has 48 divisors (see below), whose sum is σ = 1580904000. Its totient is φ = 378322560.

The previous prime is 808172081. The next prime is 808172149. The reversal of 808172145 is 541271808.

808172145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 808172145 - 2⁶ = 808172081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (808172149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13795 + ... + 42504.

It is an arithmetic number, because the mean of its divisors is an integer number (32935500).

Almost surely, 2^808172145 is an apocalyptic number.

It is an amenable number.

808172145 is a deficient number, since it is larger than the sum of its proper divisors (772731855).

808172145 is a wasteful number, since it uses less digits than its factorization.

808172145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56350 (or 56347 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 808172145 is about 28428.3686658239. The cubic root of 808172145 is about 931.4680421528.

The spelling of 808172145 in words is "eight hundred eight million, one hundred seventy-two thousand, one hundred forty-five".