1641662513 has 16 divisors (see below), whose sum is σ = 1734110976. Its totient is φ = 1551052800.

The previous prime is 1641662507. The next prime is 1641662549. The reversal of 1641662513 is 3152661461.

It is a cyclic number.

It is not a de Polignac number, because 1641662513 - 2¹⁴ = 1641646129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1641662413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366313 + ... + 1367513.

It is an arithmetic number, because the mean of its divisors is an integer number (108381936).

Almost surely, 2^1641662513 is an apocalyptic number.

It is an amenable number.

1641662513 is a deficient number, since it is larger than the sum of its proper divisors (92448463).

1641662513 is a wasteful number, since it uses less digits than its factorization.

1641662513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904.

The product of its digits is 25920, while the sum is 35.

The square root of 1641662513 is about 40517.4346794068. The cubic root of 1641662513 is about 1179.6720607893.

The spelling of 1641662513 in words is "one billion, six hundred forty-one million, six hundred sixty-two thousand, five hundred thirteen".