45158653521 has 20 divisors (see below), whose sum is σ = 69785406900. Its totient is φ = 29067637536.

The previous prime is 45158653469. The next prime is 45158653543. The reversal of 45158653521 is 12535685154.

45158653521 is a `hidden beast` number, since 4 + 5 + 15 + 86 + 535 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19219940496 + 25938713025 = 138636^2 + 161055^2 .

It is not a de Polignac number, because 45158653521 - 2²⁹ = 44621782609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45158653571) 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 19 ways as a sum of consecutive naturals, for example, 9609966 + ... + 9614663.

It is an arithmetic number, because the mean of its divisors is an integer number (3489270345).

Almost surely, 2^45158653521 is an apocalyptic number.

It is an amenable number.

45158653521 is a deficient number, since it is larger than the sum of its proper divisors (24626753379).

45158653521 is a wasteful number, since it uses less digits than its factorization.

45158653521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19224670 (or 19224661 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The spelling of 45158653521 in words is "forty-five billion, one hundred fifty-eight million, six hundred fifty-three thousand, five hundred twenty-one".