3997544378879 has 8 divisors (see below), whose sum is σ = 4023580449168. Its totient is φ = 3971588544000.

The previous prime is 3997544378873. The next prime is 3997544378903. The reversal of 3997544378879 is 9788734457993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3997544378879 - 2²⁴ = 3997527601663 is a prime.

It is a super-2 number, since 2×3997544378879² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3997544378797 and 3997544378806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997544378873) 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 7 ways as a sum of consecutive naturals, for example, 19958882 + ... + 20158175.

It is an arithmetic number, because the mean of its divisors is an integer number (502947556146).

Almost surely, 2^{3997544378879} is an apocalyptic number.

3997544378879 is a deficient number, since it is larger than the sum of its proper divisors (26036070289).

3997544378879 is a wasteful number, since it uses less digits than its factorization.

3997544378879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40117705.

The product of its digits is 11522165760, while the sum is 83.

The spelling of 3997544378879 in words is "three trillion, nine hundred ninety-seven billion, five hundred forty-four million, three hundred seventy-eight thousand, eight hundred seventy-nine".