2139660513 has 12 divisors (see below), whose sum is σ = 3197194260. Its totient is φ = 1377252576.

The previous prime is 2139660493. The next prime is 2139660529. The reversal of 2139660513 is 3150669312.

2139660513 is a `hidden beast` number, since 2 + 1 + 39 + 6 + 605 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1800474624 + 339185889 = 42432^2 + 18417^2 .

It is not a de Polignac number, because 2139660513 - 2⁶ = 2139660449 is a prime.

It is a super-2 number, since 2×2139660513² = 9156294221782846338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2139660533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4098706 + ... + 4099227.

It is an arithmetic number, because the mean of its divisors is an integer number (266432855).

Almost surely, 2^2139660513 is an apocalyptic number.

It is an amenable number.

2139660513 is a deficient number, since it is larger than the sum of its proper divisors (1057533747).

2139660513 is a wasteful number, since it uses less digits than its factorization.

2139660513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8197968 (or 8197965 counting only the distinct ones).

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

The square root of 2139660513 is about 46256.4645536167. The cubic root of 2139660513 is about 1288.5905951859.

The spelling of 2139660513 in words is "two billion, one hundred thirty-nine million, six hundred sixty thousand, five hundred thirteen".