3988780968447 has 40 divisors (see below), whose sum is σ = 6551418796032. Its totient is φ = 2398407958800.

The previous prime is 3988780968397. The next prime is 3988780968467. The reversal of 3988780968447 is 7448690878893.

3988780968447 is a `hidden beast` number, since 3 + 9 + 8 + 8 + 7 + 80 + 96 + 8 + 447 = 666.

It is not a de Polignac number, because 3988780968447 - 2⁶ = 3988780968383 is a prime.

It is a super-2 number, since 2×3988780968447² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988780968467) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17511829 + ... + 17738142.

Almost surely, 2^{3988780968447} is an apocalyptic number.

3988780968447 is a deficient number, since it is larger than the sum of its proper divisors (2562637827585).

3988780968447 is a wasteful number, since it uses less digits than its factorization.

3988780968447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35250121 (or 35250112 counting only the distinct ones).

The product of its (nonzero) digits is 4682022912, while the sum is 81.

The spelling of 3988780968447 in words is "three trillion, nine hundred eighty-eight billion, seven hundred eighty million, nine hundred sixty-eight thousand, four hundred forty-seven".