45400645 has 4 divisors (see below), whose sum is σ = 54480780. Its totient is φ = 36320512.

The previous prime is 45400639. The next prime is 45400657. The reversal of 45400645 is 54600454.

It is a Cunningham number, because it is equal to 6738²+1.

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 16337764 + 29062881 = 4042^2 + 5391^2 .

It is a cyclic number.

It is not a de Polignac number, because 45400645 - 2⁵ = 45400613 is a prime.

It is a super-2 number, since 2×45400645² = 4122437132832050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4540060 + ... + 4540069.

It is an arithmetic number, because the mean of its divisors is an integer number (13620195).

Almost surely, 2^45400645 is an apocalyptic number.

It is an amenable number.

45400645 is a deficient number, since it is larger than the sum of its proper divisors (9080135).

45400645 is an equidigital number, since it uses as much as digits as its factorization.

45400645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080134.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 45400645 is about 6738.0000742060. Note that the first 4 decimals coincide. The cubic root of 45400645 is about 356.7418068414.

The spelling of 45400645 in words is "forty-five million, four hundred thousand, six hundred forty-five".