4623656721 has 8 divisors (see below), whose sum is σ = 6221434560. Its totient is φ = 3054158352.

The previous prime is 4623656671. The next prime is 4623656729. The reversal of 4623656721 is 1276563264.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4623656721 - 2¹⁹ = 4623132433 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (4623656729) 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, 7069485 + ... + 7070138.

It is an arithmetic number, because the mean of its divisors is an integer number (777679320).

Almost surely, 2^4623656721 is an apocalyptic number.

It is an amenable number.

4623656721 is a deficient number, since it is larger than the sum of its proper divisors (1597777839).

4623656721 is a wasteful number, since it uses less digits than its factorization.

4623656721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14139735.

The product of its digits is 362880, while the sum is 42.

The square root of 4623656721 is about 67997.4758428576. The cubic root of 4623656721 is about 1665.9496091725.

The spelling of 4623656721 in words is "four billion, six hundred twenty-three million, six hundred fifty-six thousand, seven hundred twenty-one".