1216280154830 has 64 divisors (see below), whose sum is σ = 2415537633600. Its totient is φ = 438076615680.

The previous prime is 1216280154779. The next prime is 1216280154853. The reversal of 1216280154830 is 384510826121.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 76685441 + ... + 76701299.

It is an arithmetic number, because the mean of its divisors is an integer number (37742775525).

Almost surely, 2^{1216280154830} is an apocalyptic number.

1216280154830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216280154830 is a deficient number, since it is larger than the sum of its proper divisors (1199257478770).

1216280154830 is a wasteful number, since it uses less digits than its factorization.

1216280154830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30309.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 1216280154830 in words is "one trillion, two hundred sixteen billion, two hundred eighty million, one hundred fifty-four thousand, eight hundred thirty".