2451864445 has 4 divisors (see below), whose sum is σ = 2942237340. Its totient is φ = 1961491552.

The previous prime is 2451864379. The next prime is 2451864449. The reversal of 2451864445 is 5444681542.

It is a happy number.

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 1581732441 + 870132004 = 39771^2 + 29498^2 .

It is a cyclic number.

It is not a de Polignac number, because 2451864445 - 2¹¹ = 2451862397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2451864449) 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, 245186440 + ... + 245186449.

It is an arithmetic number, because the mean of its divisors is an integer number (735559335).

Almost surely, 2^2451864445 is an apocalyptic number.

It is an amenable number.

2451864445 is a deficient number, since it is larger than the sum of its proper divisors (490372895).

2451864445 is an equidigital number, since it uses as much as digits as its factorization.

2451864445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490372894.

The product of its digits is 614400, while the sum is 43.

The square root of 2451864445 is about 49516.3048399212. The cubic root of 2451864445 is about 1348.4416302320.

The spelling of 2451864445 in words is "two billion, four hundred fifty-one million, eight hundred sixty-four thousand, four hundred forty-five".