2640624242 has 8 divisors (see below), whose sum is σ = 4025869932. Its totient is φ = 1298667600.

The previous prime is 2640624241. The next prime is 2640624257. The reversal of 2640624242 is 2424260462.

It can be written as a sum of positive squares in 2 ways, for example, as 1794454321 + 846169921 = 42361^2 + 29089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2640624199 and 2640624208.

It is not an unprimeable number, because it can be changed into a prime (2640624241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10822109 + ... + 10822352.

Almost surely, 2^2640624242 is an apocalyptic number.

2640624242 is a deficient number, since it is larger than the sum of its proper divisors (1385245690).

2640624242 is a wasteful number, since it uses less digits than its factorization.

2640624242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21644524.

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 2640624242 is about 51387.0046023311. The cubic root of 2640624242 is about 1382.1935711653.

The spelling of 2640624242 in words is "two billion, six hundred forty million, six hundred twenty-four thousand, two hundred forty-two".