3920661513 has 6 divisors (see below), whose sum is σ = 5663177754. Its totient is φ = 2613774336.

The previous prime is 3920661497. The next prime is 3920661517. The reversal of 3920661513 is 3151660293.

3920661513 is a `hidden beast` number, since 3 + 9 + 20 + 6 + 615 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2719831104 + 1200830409 = 52152^2 + 34653^2 .

It is not a de Polignac number, because 3920661513 - 2⁴ = 3920661497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3920661517) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 217814520 + ... + 217814537.

It is an arithmetic number, because the mean of its divisors is an integer number (943862959).

Almost surely, 2^3920661513 is an apocalyptic number.

It is an amenable number.

3920661513 is a deficient number, since it is larger than the sum of its proper divisors (1742516241).

3920661513 is a wasteful number, since it uses less digits than its factorization.

3920661513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435629063 (or 435629060 counting only the distinct ones).

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

The square root of 3920661513 is about 62615.1859615541. The cubic root of 3920661513 is about 1576.8357213960.

The spelling of 3920661513 in words is "three billion, nine hundred twenty million, six hundred sixty-one thousand, five hundred thirteen".