5642519618 has 12 divisors (see below), whose sum is σ = 8765700450. Its totient is φ = 2723974176.

The previous prime is 5642519611. The next prime is 5642519711. The reversal of 5642519618 is 8169152465.

It can be written as a sum of positive squares in 3 ways, for example, as 5280492889 + 362026729 = 72667^2 + 19027^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5642519611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1675643 + ... + 1679006.

Almost surely, 2^5642519618 is an apocalyptic number.

5642519618 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

5642519618 is a deficient number, since it is larger than the sum of its proper divisors (3123180832).

5642519618 is a wasteful number, since it uses less digits than its factorization.

5642519618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354709 (or 3354680 counting only the distinct ones).

The product of its digits is 518400, while the sum is 47.

The square root of 5642519618 is about 75116.7066503850. The cubic root of 5642519618 is about 1780.2911212181.

The spelling of 5642519618 in words is "five billion, six hundred forty-two million, five hundred nineteen thousand, six hundred eighteen".