4642646633721 has 32 divisors (see below), whose sum is σ = 6938436775680. Its totient is φ = 3067965733248.

The previous prime is 4642646633701. The next prime is 4642646633743. The reversal of 4642646633721 is 1273366462464.

4642646633721 is a `hidden beast` number, since 4 + 6 + 4 + 264 + 6 + 6 + 3 + 372 + 1 = 666.

It is not a de Polignac number, because 4642646633721 - 2⁷ = 4642646633593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4642646633701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1577260 + ... + 3431186.

It is an arithmetic number, because the mean of its divisors is an integer number (216826149240).

Almost surely, 2^{4642646633721} is an apocalyptic number.

It is an amenable number.

4642646633721 is a deficient number, since it is larger than the sum of its proper divisors (2295790141959).

4642646633721 is a wasteful number, since it uses less digits than its factorization.

4642646633721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854750 (or 1854744 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 54.

The spelling of 4642646633721 in words is "four trillion, six hundred forty-two billion, six hundred forty-six million, six hundred thirty-three thousand, seven hundred twenty-one".