4721428647 has 12 divisors (see below), whose sum is σ = 7344444744. Its totient is φ = 2905494480.

The previous prime is 4721428643. The next prime is 4721428651. The reversal of 4721428647 is 7468241274.

It is an interprime number because it is at equal distance from previous prime (4721428643) and next prime (4721428651).

It is not a de Polignac number, because 4721428647 - 2² = 4721428643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4721428643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20176929 + ... + 20177162.

It is an arithmetic number, because the mean of its divisors is an integer number (612037062).

Almost surely, 2^4721428647 is an apocalyptic number.

4721428647 is a deficient number, since it is larger than the sum of its proper divisors (2623016097).

4721428647 is a wasteful number, since it uses less digits than its factorization.

4721428647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40354110 (or 40354107 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The square root of 4721428647 is about 68712.6527431448. The cubic root of 4721428647 is about 1677.6105305697.

The spelling of 4721428647 in words is "four billion, seven hundred twenty-one million, four hundred twenty-eight thousand, six hundred forty-seven".