3897920649168 has 120 divisors (see below), whose sum is σ = 13426171170048. Its totient is φ = 1028023024896.

The previous prime is 3897920649137. The next prime is 3897920649187. The reversal of 3897920649168 is 8619460297983.

3897920649168 is a `hidden beast` number, since 3 + 8 + 9 + 79 + 2 + 0 + 6 + 491 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 3897920649096 and 3897920649105.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 148717080 + ... + 148743287.

Almost surely, 2^{3897920649168} is an apocalyptic number.

It is an amenable number.

3897920649168 is an abundant number, since it is smaller than the sum of its proper divisors (9528250520880).

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

3897920649168 is a wasteful number, since it uses less digits than its factorization.

3897920649168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297460401 (or 297460392 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 3897920649168 in words is "three trillion, eight hundred ninety-seven billion, nine hundred twenty million, six hundred forty-nine thousand, one hundred sixty-eight".