1216986147385 has 16 divisors (see below), whose sum is σ = 1510882401600. Its totient is φ = 939929167296.

The previous prime is 1216986147353. The next prime is 1216986147397. The reversal of 1216986147385 is 5837416896121.

It is a cyclic number.

It is not a de Polignac number, because 1216986147385 - 2⁵ = 1216986147353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1189546 + ... + 1961884.

It is an arithmetic number, because the mean of its divisors is an integer number (94430150100).

Almost surely, 2^{1216986147385} is an apocalyptic number.

It is an amenable number.

1216986147385 is a deficient number, since it is larger than the sum of its proper divisors (293896254215).

1216986147385 is a wasteful number, since it uses less digits than its factorization.

1216986147385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783240.

The product of its digits is 17418240, while the sum is 61.

The spelling of 1216986147385 in words is "one trillion, two hundred sixteen billion, nine hundred eighty-six million, one hundred forty-seven thousand, three hundred eighty-five".