16987137285636 has 144 divisors (see below), whose sum is σ = 51213180066048. Its totient is φ = 4641941779200.

The previous prime is 16987137285611. The next prime is 16987137285637. The reversal of 16987137285636 is 63658273178961.

It is a happy number.

16987137285636 is a `hidden beast` number, since 1 + 6 + 9 + 8 + 7 + 1 + 37 + 28 + 563 + 6 = 666.

It is a super-2 number, since 2×16987137285636² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16987137285637) 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, 54681066 + ... + 54990846.

It is an arithmetic number, because the mean of its divisors is an integer number (355647083792).

Almost surely, 2^{16987137285636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16987137285636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25606590033024).

16987137285636 is an abundant number, since it is smaller than the sum of its proper divisors (34226042780412).

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

16987137285636 is a wasteful number, since it uses less digits than its factorization.

16987137285636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319282 (or 319277 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 72.

The spelling of 16987137285636 in words is "sixteen trillion, nine hundred eighty-seven billion, one hundred thirty-seven million, two hundred eighty-five thousand, six hundred thirty-six".