163706351616 has 104 divisors (see below), whose sum is σ = 484996973360. Its totient is φ = 54568747008.

The previous prime is 163706351587. The next prime is 163706351729. The reversal of 163706351616 is 616153607361.

It is a happy number.

163706351616 is a `hidden beast` number, since 1 + 6 + 3 + 7 + 0 + 635 + 1 + 6 + 1 + 6 = 666.

It is a super-2 number, since 2×163706351616² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629545 + ... + 850728.

Almost surely, 2^163706351616 is an apocalyptic number.

163706351616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

163706351616 is an abundant number, since it is smaller than the sum of its proper divisors (321290621744).

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

163706351616 is an equidigital number, since it uses as much as digits as its factorization.

163706351616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480306 (or 1480278 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

Adding to 163706351616 its reverse (616153607361), we get a palindrome (779859958977).

The spelling of 163706351616 in words is "one hundred sixty-three billion, seven hundred six million, three hundred fifty-one thousand, six hundred sixteen".