4247621686 has 32 divisors (see below), whose sum is σ = 7949809152. Its totient is φ = 1653624960.

The previous prime is 4247621681. The next prime is 4247621699. The reversal of 4247621686 is 6861267424.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4247621681) 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 15 ways as a sum of consecutive naturals, for example, 200430 + ... + 220606.

It is an arithmetic number, because the mean of its divisors is an integer number (248431536).

Almost surely, 2^4247621686 is an apocalyptic number.

4247621686 is a deficient number, since it is larger than the sum of its proper divisors (3702187466).

4247621686 is a wasteful number, since it uses less digits than its factorization.

4247621686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21564.

The product of its digits is 774144, while the sum is 46.

The square root of 4247621686 is about 65173.7806636994. The cubic root of 4247621686 is about 1619.5036946873.

The spelling of 4247621686 in words is "four billion, two hundred forty-seven million, six hundred twenty-one thousand, six hundred eighty-six".