4705128621 has 8 divisors (see below), whose sum is σ = 6970560960. Its totient is φ = 3136752396.

The previous prime is 4705128619. The next prime is 4705128661. The reversal of 4705128621 is 1268215074.

4705128621 is a `hidden beast` number, since 4 + 7 + 0 + 5 + 1 + 28 + 621 = 666.

It is not a de Polignac number, because 4705128621 - 2¹ = 4705128619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4705128601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87131985 + ... + 87132038.

It is an arithmetic number, because the mean of its divisors is an integer number (871320120).

Almost surely, 2^4705128621 is an apocalyptic number.

It is an amenable number.

4705128621 is a deficient number, since it is larger than the sum of its proper divisors (2265432339).

4705128621 is a wasteful number, since it uses less digits than its factorization.

4705128621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174264032 (or 174264026 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 4705128621 is about 68593.9401186431. The cubic root of 4705128621 is about 1675.6777381820.

The spelling of 4705128621 in words is "four billion, seven hundred five million, one hundred twenty-eight thousand, six hundred twenty-one".