1388516853861 has 24 divisors (see below), whose sum is σ = 2086090237504. Its totient is φ = 922931029440.

The previous prime is 1388516853859. The next prime is 1388516853883. The reversal of 1388516853861 is 1683586158831.

1388516853861 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 516 + 8 + 53 + 8 + 61 = 666.

It is not a de Polignac number, because 1388516853861 - 2¹ = 1388516853859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388516853821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8395945 + ... + 8559726.

Almost surely, 2^{1388516853861} is an apocalyptic number.

It is an amenable number.

1388516853861 is a deficient number, since it is larger than the sum of its proper divisors (697573383643).

1388516853861 is an equidigital number, since it uses as much as digits as its factorization.

1388516853861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16956023 (or 16956011 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 63.

The spelling of 1388516853861 in words is "one trillion, three hundred eighty-eight billion, five hundred sixteen million, eight hundred fifty-three thousand, eight hundred sixty-one".