1216988074834 has 16 divisors (see below), whose sum is σ = 2086338359808. Its totient is φ = 521548045632.

The previous prime is 1216988074831. The next prime is 1216988074871. The reversal of 1216988074834 is 4384708896121.

It is not an unprimeable number, because it can be changed into a prime (1216988074831) 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, 1104834 + ... + 1911709.

It is an arithmetic number, because the mean of its divisors is an integer number (130396147488).

Almost surely, 2^{1216988074834} is an apocalyptic number.

1216988074834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1216988074834 is a deficient number, since it is larger than the sum of its proper divisors (869350284974).

1216988074834 is a wasteful number, since it uses less digits than its factorization.

1216988074834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045369.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 1216988074834 in words is "one trillion, two hundred sixteen billion, nine hundred eighty-eight million, seventy-four thousand, eight hundred thirty-four".