848639307861 has 24 divisors (see below), whose sum is σ = 1288869973560. Its totient is φ = 537295651200.

The previous prime is 848639307847. The next prime is 848639307863. The reversal of 848639307861 is 168703936848.

848639307861 is a `hidden beast` number, since 8 + 486 + 3 + 93 + 0 + 7 + 8 + 61 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 130840634961 + 717798672900 = 361719^2 + 847230^2 .

It is not a de Polignac number, because 848639307861 - 2²¹ = 848637210709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (848639307863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26635650 + ... + 26667491.

It is an arithmetic number, because the mean of its divisors is an integer number (53702915565).

Almost surely, 2^848639307861 is an apocalyptic number.

It is an amenable number.

848639307861 is a deficient number, since it is larger than the sum of its proper divisors (440230665699).

848639307861 is a wasteful number, since it uses less digits than its factorization.

848639307861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53303237 (or 53303234 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 848639307861 in words is "eight hundred forty-eight billion, six hundred thirty-nine million, three hundred seven thousand, eight hundred sixty-one".