3999653964 has 120 divisors (see below), whose sum is σ = 10593652608. Its totient is φ = 1315802880.

The previous prime is 3999653941. The next prime is 3999654011. The reversal of 3999653964 is 4693569993.

3999653964 is a `hidden beast` number, since 3 + 9 + 9 + 96 + 539 + 6 + 4 = 666.

3999653964 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14233504 + ... + 14233784.

Almost surely, 2^3999653964 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 3999653964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5296826304).

3999653964 is an abundant number, since it is smaller than the sum of its proper divisors (6593998644).

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

3999653964 is a wasteful number, since it uses less digits than its factorization.

3999653964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 706 counting only the distinct ones).

The product of its digits is 42515280, while the sum is 63.

The square root of 3999653964 is about 63242.8174894193. The cubic root of 3999653964 is about 1587.3552758223.

The spelling of 3999653964 in words is "three billion, nine hundred ninety-nine million, six hundred fifty-three thousand, nine hundred sixty-four".