3916521630 has 144 divisors (see below), whose sum is σ = 12065021280. Its totient is φ = 862468992.

The previous prime is 3916521593. The next prime is 3916521683. The reversal of 3916521630 is 361256193.

3916521630 is a `hidden beast` number, since 3 + 9 + 16 + 5 + 2 + 1 + 630 = 666.

3916521630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8458779 + ... + 8459241.

It is an arithmetic number, because the mean of its divisors is an integer number (83784870).

Almost surely, 2^3916521630 is an apocalyptic number.

3916521630 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3916521630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6032510640).

3916521630 is an abundant number, since it is smaller than the sum of its proper divisors (8148499650).

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

3916521630 is a wasteful number, since it uses less digits than its factorization.

3916521630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 3916521630 is about 62582.1190916383. The cubic root of 3916521630 is about 1576.2805247483.

The spelling of 3916521630 in words is "three billion, nine hundred sixteen million, five hundred twenty-one thousand, six hundred thirty".