7621808242 has 36 divisors (see below), whose sum is σ = 12140574894. Its totient is φ = 3586452000.

The previous prime is 7621808209. The next prime is 7621808261. The reversal of 7621808242 is 2428081267.

It can be written as a sum of positive squares in only one way, i.e., 7528859361 + 92948881 = 86769^2 + 9641^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7621808195 and 7621808204.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24507267 + ... + 24507577.

Almost surely, 2^7621808242 is an apocalyptic number.

7621808242 is a deficient number, since it is larger than the sum of its proper divisors (4518766652).

7621808242 is an equidigital number, since it uses as much as digits as its factorization.

7621808242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 7621808242 is about 87302.9681167828. The cubic root of 7621808242 is about 1967.9739227010.

The spelling of 7621808242 in words is "seven billion, six hundred twenty-one million, eight hundred eight thousand, two hundred forty-two".