808642945 has 16 divisors (see below), whose sum is σ = 1114303680. Its totient is φ = 557150400.

The previous prime is 808642921. The next prime is 808642949. The reversal of 808642945 is 549246808.

It is not a de Polignac number, because 808642945 - 2¹¹ = 808640897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 808642895 and 808642904.

It is not an unprimeable number, because it can be changed into a prime (808642949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385866 + ... + 387955.

It is an arithmetic number, because the mean of its divisors is an integer number (69643980).

Almost surely, 2^808642945 is an apocalyptic number.

It is an amenable number.

808642945 is a deficient number, since it is larger than the sum of its proper divisors (305660735).

808642945 is a wasteful number, since it uses less digits than its factorization.

808642945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773856.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 808642945 is about 28436.6479213004. The cubic root of 808642945 is about 931.6488823481.

The spelling of 808642945 in words is "eight hundred eight million, six hundred forty-two thousand, nine hundred forty-five".