816245945 has 16 divisors (see below), whose sum is σ = 1004590080. Its totient is φ = 636385344.

The previous prime is 816245921. The next prime is 816245957. The reversal of 816245945 is 549542618.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816245945 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 816245896 and 816245905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48899 + ... + 63431.

It is an arithmetic number, because the mean of its divisors is an integer number (62786880).

Almost surely, 2^816245945 is an apocalyptic number.

It is an amenable number.

816245945 is a deficient number, since it is larger than the sum of its proper divisors (188344135).

816245945 is a wasteful number, since it uses less digits than its factorization.

816245945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14824.

The product of its digits is 345600, while the sum is 44.

The square root of 816245945 is about 28570.0182884086. The cubic root of 816245945 is about 934.5596198914.

The spelling of 816245945 in words is "eight hundred sixteen million, two hundred forty-five thousand, nine hundred forty-five".