1782978915612 has 24 divisors (see below), whose sum is σ = 4160869549200. Its totient is φ = 594242674816.

The previous prime is 1782978915533. The next prime is 1782978915629. The reversal of 1782978915612 is 2165198792871.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10364937 + ... + 10535552.

It is an arithmetic number, because the mean of its divisors is an integer number (173369564550).

Almost surely, 2^{1782978915612} is an apocalyptic number.

1782978915612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1782978915612 is an abundant number, since it is smaller than the sum of its proper divisors (2377890633588).

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

1782978915612 is a wasteful number, since it uses less digits than its factorization.

1782978915612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20907605 (or 20907603 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 66.

It can be divided in two parts, 178297 and 8915612, that added together give a palindrome (9093909).

The spelling of 1782978915612 in words is "one trillion, seven hundred eighty-two billion, nine hundred seventy-eight million, nine hundred fifteen thousand, six hundred twelve".