3961635594 has 120 divisors (see below), whose sum is σ = 9521607360. Its totient is φ = 1098626256.

The previous prime is 3961635533. The next prime is 3961635661. The reversal of 3961635594 is 4955361693.

It is a happy number.

Its product of digits (2624400) is a multiple of the sum of its prime divisors (150).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 50147247 + ... + 50147325.

It is an arithmetic number, because the mean of its divisors is an integer number (79346728).

Almost surely, 2^3961635594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3961635594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4760803680).

3961635594 is an abundant number, since it is smaller than the sum of its proper divisors (5559971766).

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

3961635594 is an frugal number, since it uses more digits than its factorization.

3961635594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 150 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 51.

The square root of 3961635594 is about 62941.5251960103. The cubic root of 3961635594 is about 1582.3097652225.

The spelling of 3961635594 in words is "three billion, nine hundred sixty-one million, six hundred thirty-five thousand, five hundred ninety-four".