7424685621 has 12 divisors (see below), whose sum is σ = 11355401772. Its totient is φ = 4658626176.

The previous prime is 7424685581. The next prime is 7424685629. The reversal of 7424685621 is 1265864247.

7424685621 is a `hidden beast` number, since 7 + 4 + 24 + 68 + 562 + 1 = 666.

7424685621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3270238596 + 4154447025 = 57186^2 + 64455^2 .

It is not a de Polignac number, because 7424685621 - 2⁹ = 7424685109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7424685629) 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 11 ways as a sum of consecutive naturals, for example, 24263526 + ... + 24263831.

It is an arithmetic number, because the mean of its divisors is an integer number (946283481).

Almost surely, 2^7424685621 is an apocalyptic number.

It is an amenable number.

7424685621 is a deficient number, since it is larger than the sum of its proper divisors (3930716151).

7424685621 is a wasteful number, since it uses less digits than its factorization.

7424685621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48527380 (or 48527377 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 7424685621 is about 86166.6154667804. The cubic root of 7424685621 is about 1950.8596359734.

The spelling of 7424685621 in words is "seven billion, four hundred twenty-four million, six hundred eighty-five thousand, six hundred twenty-one".