4646145207221 has 4 divisors (see below), whose sum is σ = 5309880236832. Its totient is φ = 3982410177612.

The previous prime is 4646145207203. The next prime is 4646145207281. The reversal of 4646145207221 is 1227025416464.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4646145207221 - 2¹⁸ = 4646144945077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4646145207281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331867514795 + ... + 331867514808.

It is an arithmetic number, because the mean of its divisors is an integer number (1327470059208).

Almost surely, 2^{4646145207221} is an apocalyptic number.

It is an amenable number.

4646145207221 is a deficient number, since it is larger than the sum of its proper divisors (663735029611).

4646145207221 is an equidigital number, since it uses as much as digits as its factorization.

4646145207221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663735029610.

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 4646145207221 in words is "four trillion, six hundred forty-six billion, one hundred forty-five million, two hundred seven thousand, two hundred twenty-one".