16012135215 has 32 divisors (see below), whose sum is σ = 28528416960. Its totient is φ = 8521085952.

The previous prime is 16012135199. The next prime is 16012135241. The reversal of 16012135215 is 51253121061.

16012135215 is a `hidden beast` number, since 1 + 601 + 2 + 1 + 3 + 52 + 1 + 5 = 666.

It is not a de Polignac number, because 16012135215 - 2⁴ = 16012135199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68074 + ... + 191463.

It is an arithmetic number, because the mean of its divisors is an integer number (891513030).

Almost surely, 2^16012135215 is an apocalyptic number.

16012135215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16012135215 is a deficient number, since it is larger than the sum of its proper divisors (12516281745).

16012135215 is a wasteful number, since it uses less digits than its factorization.

16012135215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260008 (or 260002 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 16012135215 its reverse (51253121061), we get a palindrome (67265256276).

The spelling of 16012135215 in words is "sixteen billion, twelve million, one hundred thirty-five thousand, two hundred fifteen".