16535231214678 has 128 divisors (see below), whose sum is σ = 40458237811200. Its totient is φ = 4964084092800.

The previous prime is 16535231214661. The next prime is 16535231214721. The reversal of 16535231214678 is 87641213253561.

It is a happy number.

16535231214678 is a `hidden beast` number, since 1 + 6 + 5 + 3 + 52 + 3 + 121 + 467 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 972023193 + ... + 972040203.

It is an arithmetic number, because the mean of its divisors is an integer number (316079982900).

Almost surely, 2^{16535231214678} is an apocalyptic number.

16535231214678 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 16535231214678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20229118905600).

16535231214678 is an abundant number, since it is smaller than the sum of its proper divisors (23923006596522).

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

16535231214678 is a wasteful number, since it uses less digits than its factorization.

16535231214678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32155 (or 32149 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 16535231214678 in words is "sixteen trillion, five hundred thirty-five billion, two hundred thirty-one million, two hundred fourteen thousand, six hundred seventy-eight".