1868656545 has 24 divisors (see below), whose sum is σ = 3701720256. Its totient is φ = 854242848.

The previous prime is 1868656529. The next prime is 1868656577. The reversal of 1868656545 is 5456568681.

1868656545 is a `hidden beast` number, since 18 + 6 + 86 + 5 + 6 + 545 = 666.

It is not a de Polignac number, because 1868656545 - 2⁴ = 1868656529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1868656491 and 1868656500.

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, 2965807 + ... + 2966436.

It is an arithmetic number, because the mean of its divisors is an integer number (154238344).

Almost surely, 2^1868656545 is an apocalyptic number.

1868656545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1868656545 is a deficient number, since it is larger than the sum of its proper divisors (1833063711).

1868656545 is a wasteful number, since it uses less digits than its factorization.

1868656545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932261 (or 5932258 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The square root of 1868656545 is about 43227.9602225226. The cubic root of 1868656545 is about 1231.7138610738.

The spelling of 1868656545 in words is "one billion, eight hundred sixty-eight million, six hundred fifty-six thousand, five hundred forty-five".