4640763332221 has 4 divisors (see below), whose sum is σ = 4641082321500. Its totient is φ = 4640444342944.

The previous prime is 4640763332207. The next prime is 4640763332269. The reversal of 4640763332221 is 1222333670464.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2317001508900 + 2323761823321 = 1522170^2 + 1524389^2 .

It is a cyclic number.

It is not a de Polignac number, because 4640763332221 - 2⁹ = 4640763331709 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 (4640763372221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159472816 + ... + 159501913.

It is an arithmetic number, because the mean of its divisors is an integer number (1160270580375).

Almost surely, 2^{4640763332221} is an apocalyptic number.

It is an amenable number.

4640763332221 is a deficient number, since it is larger than the sum of its proper divisors (318989279).

4640763332221 is a wasteful number, since it uses less digits than its factorization.

4640763332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318989278.

The product of its (nonzero) digits is 870912, while the sum is 43.

The spelling of 4640763332221 in words is "four trillion, six hundred forty billion, seven hundred sixty-three million, three hundred thirty-two thousand, two hundred twenty-one".