2645520521 has 8 divisors (see below), whose sum is σ = 3023784000. Its totient is φ = 2267340048.

The previous prime is 2645520509. The next prime is 2645520523. The reversal of 2645520521 is 1250255462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2645520521 - 2¹⁰ = 2645519497 is a prime.

It is a super-2 number, since 2×2645520521² = 13997557654064222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645520523) 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 7 ways as a sum of consecutive naturals, for example, 80495 + ... + 108491.

It is an arithmetic number, because the mean of its divisors is an integer number (377973000).

Almost surely, 2^2645520521 is an apocalyptic number.

It is an amenable number.

2645520521 is a deficient number, since it is larger than the sum of its proper divisors (378263479).

2645520521 is a wasteful number, since it uses less digits than its factorization.

2645520521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41503.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 2645520521 is about 51434.6237567652. The cubic root of 2645520521 is about 1383.0473373181.

Adding to 2645520521 its reverse (1250255462), we get a palindrome (3895775983).

The spelling of 2645520521 in words is "two billion, six hundred forty-five million, five hundred twenty thousand, five hundred twenty-one".