1545916785868 has 24 divisors (see below), whose sum is σ = 3329666924192. Its totient is φ = 611571475584.

The previous prime is 1545916785797. The next prime is 1545916785893. The reversal of 1545916785868 is 8685876195451.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1545916785868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2123511705 + ... + 2123512432.

Almost surely, 2^{1545916785868} is an apocalyptic number.

It is an amenable number.

1545916785868 is an abundant number, since it is smaller than the sum of its proper divisors (1783750138324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1545916785868 is a wasteful number, since it uses less digits than its factorization.

1545916785868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247024161 (or 4247024159 counting only the distinct ones).

The product of its digits is 580608000, while the sum is 73.

The spelling of 1545916785868 in words is "one trillion, five hundred forty-five billion, nine hundred sixteen million, seven hundred eighty-five thousand, eight hundred sixty-eight".