1216042582860 has 96 divisors (see below), whose sum is σ = 4323706974720. Its totient is φ = 277952589504.

The previous prime is 1216042582801. The next prime is 1216042582961. The reversal of 1216042582860 is 682852406121.

1216042582860 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 0 + 4 + 2 + 582 + 8 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 160848414 + ... + 160855973.

It is an arithmetic number, because the mean of its divisors is an integer number (45038614320).

Almost surely, 2^{1216042582860} is an apocalyptic number.

1216042582860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216042582860 is an abundant number, since it is smaller than the sum of its proper divisors (3107664391860).

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

1216042582860 is a wasteful number, since it uses less digits than its factorization.

1216042582860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321704412 (or 321704404 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

Adding to 1216042582860 its reverse (682852406121), we get a palindrome (1898894988981).

The spelling of 1216042582860 in words is "one trillion, two hundred sixteen billion, forty-two million, five hundred eighty-two thousand, eight hundred sixty".