4538770332721 has 3 divisors (see below), whose sum is σ = 4538772463161. Its totient is φ = 4538768202282.

The previous prime is 4538770332683. The next prime is 4538770332821. The reversal of 4538770332721 is 1272330778354.

The square root of 4538770332721 is 2130439.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4538770332721 - 2⁹ = 4538770332209 is a prime.

It is a super-2 number, since 2×4538770332721² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4538770332821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1065220 + ... + 3195658.

It is an arithmetic number, because the mean of its divisors is an integer number (1512924154387).

Almost surely, 2^{4538770332721} is an apocalyptic number.

4538770332721 is the 2130439-th square number.

4538770332721 is the 1065220-th centered octagonal number.

It is an amenable number.

4538770332721 is a deficient number, since it is larger than the sum of its proper divisors (2130440).

4538770332721 is an frugal number, since it uses more digits than its factorization.

4538770332721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260878 (or 2130439 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 52.

The spelling of 4538770332721 in words is "four trillion, five hundred thirty-eight billion, seven hundred seventy million, three hundred thirty-two thousand, seven hundred twenty-one".