45123320025 has 72 divisors (see below), whose sum is σ = 95787799744. Its totient is φ = 20627784000.

The previous prime is 45123320009. The next prime is 45123320029. The reversal of 45123320025 is 52002332154.

It is a happy number.

45123320025 is a `hidden beast` number, since 451 + 2 + 3 + 3 + 200 + 2 + 5 = 666.

It is not a de Polignac number, because 45123320025 - 2⁴ = 45123320009 is a prime.

It is a super-2 number, since 2×45123320025² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45123320029) 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 71 ways as a sum of consecutive naturals, for example, 488026 + ... + 573075.

Almost surely, 2^45123320025 is an apocalyptic number.

45123320025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

45123320025 is an abundant number, since it is smaller than the sum of its proper divisors (50664479719).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45123320025 is a wasteful number, since it uses less digits than its factorization.

45123320025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061133 (or 1061116 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 45123320025 its reverse (52002332154), we get a palindrome (97125652179).

The spelling of 45123320025 in words is "forty-five billion, one hundred twenty-three million, three hundred twenty thousand, twenty-five".