3964695650 has 12 divisors (see below), whose sum is σ = 7374334002. Its totient is φ = 1585878240.

The previous prime is 3964695643. The next prime is 3964695661. The reversal of 3964695650 is 565964693.

It can be written as a sum of positive squares in 3 ways, for example, as 3609486241 + 355209409 = 60079^2 + 18847^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3964695592 and 3964695601.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39646907 + ... + 39647006.

Almost surely, 2^3964695650 is an apocalyptic number.

3964695650 is a deficient number, since it is larger than the sum of its proper divisors (3409638352).

3964695650 is a wasteful number, since it uses less digits than its factorization.

3964695650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79293925 (or 79293920 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 53.

The square root of 3964695650 is about 62965.8292250646. The cubic root of 3964695650 is about 1582.7170641972.

The spelling of 3964695650 in words is "three billion, nine hundred sixty-four million, six hundred ninety-five thousand, six hundred fifty".