1216502934678 has 96 divisors (see below), whose sum is σ = 2719927641600. Its totient is φ = 392659107840.

The previous prime is 1216502934677. The next prime is 1216502934697. The reversal of 1216502934678 is 8764392056121.

It is a happy number.

1216502934678 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 502 + 93 + 46 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216502934677) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253488523 + ... + 253493321.

It is an arithmetic number, because the mean of its divisors is an integer number (28332579600).

It is a 1-persistent number, because it is pandigital, but 2⋅1216502934678 = 2433005869356 is not.

Almost surely, 2^{1216502934678} is an apocalyptic number.

1216502934678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216502934678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1359963820800).

1216502934678 is an abundant number, since it is smaller than the sum of its proper divisors (1503424706922).

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

1216502934678 is a wasteful number, since it uses less digits than its factorization.

1216502934678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6582 (or 6579 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 1216502934678 in words is "one trillion, two hundred sixteen billion, five hundred two million, nine hundred thirty-four thousand, six hundred seventy-eight".