845851857615 has 24 divisors (see below), whose sum is σ = 1516699884960. Its totient is φ = 435565093824.

The previous prime is 845851857589. The next prime is 845851857647. The reversal of 845851857615 is 516758158548.

845851857615 is a `hidden beast` number, since 8 + 4 + 5 + 8 + 5 + 1 + 8 + 5 + 7 + 615 = 666.

845851857615 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 845851857615 - 2⁸ = 845851857359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324079867 + ... + 324082476.

It is an arithmetic number, because the mean of its divisors is an integer number (63195828540).

Almost surely, 2^845851857615 is an apocalyptic number.

845851857615 is a deficient number, since it is larger than the sum of its proper divisors (670848027345).

845851857615 is a wasteful number, since it uses less digits than its factorization.

845851857615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648162383 (or 648162380 counting only the distinct ones).

The product of its digits is 53760000, while the sum is 63.

The spelling of 845851857615 in words is "eight hundred forty-five billion, eight hundred fifty-one million, eight hundred fifty-seven thousand, six hundred fifteen".