2493766521 has 20 divisors (see below), whose sum is σ = 3853716900. Its totient is φ = 1605181536.

The previous prime is 2493766519. The next prime is 2493766531. The reversal of 2493766521 is 1256673942.

It can be written as a sum of positive squares in 2 ways, for example, as 2103506496 + 390260025 = 45864^2 + 19755^2 .

It is not a de Polignac number, because 2493766521 - 2¹ = 2493766519 is a prime.

It is a super-2 number, since 2×2493766521² = 12437742922520886882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2493766531) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 528466 + ... + 533163.

It is an arithmetic number, because the mean of its divisors is an integer number (192685845).

Almost surely, 2^2493766521 is an apocalyptic number.

It is an amenable number.

2493766521 is a deficient number, since it is larger than the sum of its proper divisors (1359950379).

2493766521 is a wasteful number, since it uses less digits than its factorization.

2493766521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061670 (or 1061661 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 2493766521 is about 49937.6263052220. The cubic root of 2493766521 is about 1356.0798517860.

The spelling of 2493766521 in words is "two billion, four hundred ninety-three million, seven hundred sixty-six thousand, five hundred twenty-one".