45450402521 has 4 divisors (see below), whose sum is σ = 45451189044. Its totient is φ = 45449616000.

The previous prime is 45450402449. The next prime is 45450402553. The reversal of 45450402521 is 12520405454.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1754353225 + 43696049296 = 41885^2 + 209036^2 .

It is a cyclic number.

It is not a de Polignac number, because 45450402521 - 2³⁰ = 44376660697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45450407521) 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 3 ways as a sum of consecutive naturals, for example, 299060 + ... + 424661.

It is an arithmetic number, because the mean of its divisors is an integer number (11362797261).

Almost surely, 2^45450402521 is an apocalyptic number.

It is an amenable number.

45450402521 is a deficient number, since it is larger than the sum of its proper divisors (786523).

45450402521 is an equidigital number, since it uses as much as digits as its factorization.

45450402521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786522.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 45450402521 its reverse (12520405454), we get a palindrome (57970807975).

The spelling of 45450402521 in words is "forty-five billion, four hundred fifty million, four hundred two thousand, five hundred twenty-one".