3975518656 has 56 divisors (see below), whose sum is σ = 8320308480. Its totient is φ = 1879471872.

The previous prime is 3975518623. The next prime is 3975518683. The reversal of 3975518656 is 6568155793.

It is a super-3 number, since 3×3975518656³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3975518597 and 3975518606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681705 + ... + 687511.

Almost surely, 2^3975518656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3975518656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4160154240).

3975518656 is an abundant number, since it is smaller than the sum of its proper divisors (4344789824).

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

3975518656 is a wasteful number, since it uses less digits than its factorization.

3975518656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401 (or 6391 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 55.

The square root of 3975518656 is about 63051.7141400613. The cubic root of 3975518656 is about 1584.1559466230.

The spelling of 3975518656 in words is "three billion, nine hundred seventy-five million, five hundred eighteen thousand, six hundred fifty-six".