1216983559454 has 16 divisors (see below), whose sum is σ = 2033686055520. Its totient is φ = 542316280800.

The previous prime is 1216983559439. The next prime is 1216983559459. The reversal of 1216983559454 is 4549553896121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216983559459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807017522 + ... + 807019029.

It is an arithmetic number, because the mean of its divisors is an integer number (127105378470).

Almost surely, 2^{1216983559454} is an apocalyptic number.

1216983559454 is a deficient number, since it is larger than the sum of its proper divisors (816702496066).

1216983559454 is a wasteful number, since it uses less digits than its factorization.

1216983559454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614036595.

The product of its digits is 46656000, while the sum is 62.

The spelling of 1216983559454 in words is "one trillion, two hundred sixteen billion, nine hundred eighty-three million, five hundred fifty-nine thousand, four hundred fifty-four".