5440645521 has 12 divisors (see below), whose sum is σ = 7859496372. Its totient is φ = 3626734176.

The previous prime is 5440645499. The next prime is 5440645577. The reversal of 5440645521 is 1255460445.

5440645521 is a `hidden beast` number, since 5 + 4 + 4 + 0 + 645 + 5 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1086625296 + 4354020225 = 32964^2 + 65985^2 .

It is not a de Polignac number, because 5440645521 - 2¹⁷ = 5440514449 is a prime.

It is a super-2 number, since 2×5440645521² = 59201247370354722882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5440645591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89815 + ... + 137651.

It is an arithmetic number, because the mean of its divisors is an integer number (654958031).

Almost surely, 2^5440645521 is an apocalyptic number.

It is an amenable number.

5440645521 is a deficient number, since it is larger than the sum of its proper divisors (2418850851).

5440645521 is a wasteful number, since it uses less digits than its factorization.

5440645521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60480 (or 60477 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 5440645521 is about 73760.7315649730. The cubic root of 5440645521 is about 1758.8014309621.

The spelling of 5440645521 in words is "five billion, four hundred forty million, six hundred forty-five thousand, five hundred twenty-one".