168901416639 has 6 divisors (see below), whose sum is σ = 243968712936. Its totient is φ = 112600944420.

The previous prime is 168901416613. The next prime is 168901416647. The reversal of 168901416639 is 936614109861.

It is a happy number.

168901416639 is a `hidden beast` number, since 168 + 9 + 0 + 1 + 416 + 63 + 9 = 666.

It is not a de Polignac number, because 168901416639 - 2¹² = 168901412543 is a prime.

It is a super-2 number, since 2×168901416639² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168901416679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9383412027 + ... + 9383412044.

It is an arithmetic number, because the mean of its divisors is an integer number (40661452156).

Almost surely, 2^168901416639 is an apocalyptic number.

168901416639 is a deficient number, since it is larger than the sum of its proper divisors (75067296297).

168901416639 is a wasteful number, since it uses less digits than its factorization.

168901416639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18766824077 (or 18766824074 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 168901416639 in words is "one hundred sixty-eight billion, nine hundred one million, four hundred sixteen thousand, six hundred thirty-nine".