2493522069921 has 27 divisors (see below), whose sum is σ = 3687765034707. Its totient is φ = 1623556146240.

The previous prime is 2493522069869. The next prime is 2493522069931. The reversal of 2493522069921 is 1299602253942.

The square root of 2493522069921 is 1579089.

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

2493522069921 is a `hidden beast` number, since 2 + 4 + 9 + 3 + 522 + 0 + 6 + 99 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 637824252321 + 1855697817600 = 798639^2 + 1362240^2 .

It is not a de Polignac number, because 2493522069921 - 2¹⁷ = 2493521938849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2493522069931) 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 26 ways as a sum of consecutive naturals, for example, 203696361 + ... + 203708601.

Almost surely, 2^{2493522069921} is an apocalyptic number.

2493522069921 is the 1579089-th square number.

2493522069921 is the 789545-th centered octagonal number.

It is an amenable number.

2493522069921 is a deficient number, since it is larger than the sum of its proper divisors (1194242964786).

2493522069921 is an frugal number, since it uses more digits than its factorization.

2493522069921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24574 (or 12287 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 2493522069921 in words is "two trillion, four hundred ninety-three billion, five hundred twenty-two million, sixty-nine thousand, nine hundred twenty-one".