845039865 has 16 divisors (see below), whose sum is σ = 1354661568. Its totient is φ = 449822016.

The previous prime is 845039861. The next prime is 845039879. The reversal of 845039865 is 568930548.

It is a happy number.

It is not a de Polignac number, because 845039865 - 2² = 845039861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (845039861) 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, 46014 + ... + 61703.

It is an arithmetic number, because the mean of its divisors is an integer number (84666348).

Almost surely, 2^845039865 is an apocalyptic number.

It is an amenable number.

845039865 is a deficient number, since it is larger than the sum of its proper divisors (509621703).

845039865 is a wasteful number, since it uses less digits than its factorization.

845039865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108248.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 845039865 is about 29069.5693982556. The cubic root of 845039865 is about 945.4220616851.

The spelling of 845039865 in words is "eight hundred forty-five million, thirty-nine thousand, eight hundred sixty-five".