7478863021 has 16 divisors (see below), whose sum is σ = 8982438784. Its totient is φ = 6092138304.

The previous prime is 7478863009. The next prime is 7478863061. The reversal of 7478863021 is 1203688747.

7478863021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7478863021 - 2⁹ = 7478862509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7478863061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324630 + ... + 346903.

It is an arithmetic number, because the mean of its divisors is an integer number (561402424).

Almost surely, 2^7478863021 is an apocalyptic number.

It is an amenable number.

7478863021 is a deficient number, since it is larger than the sum of its proper divisors (1503575763).

7478863021 is a wasteful number, since it uses less digits than its factorization.

7478863021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671620.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 7478863021 is about 86480.4198706274. The cubic root of 7478863021 is about 1955.5932354125.

The spelling of 7478863021 in words is "seven billion, four hundred seventy-eight million, eight hundred sixty-three thousand, twenty-one".