1453351645 has 4 divisors (see below), whose sum is σ = 1744021980. Its totient is φ = 1162681312.

The previous prime is 1453351619. The next prime is 1453351649. The reversal of 1453351645 is 5461533541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5461533541 = 25577 ⋅213533.

It can be written as a sum of positive squares in 2 ways, for example, as 580858201 + 872493444 = 24101^2 + 29538^2 .

It is a cyclic number.

It is not a de Polignac number, because 1453351645 - 2¹³ = 1453343453 is a prime.

It is a super-4 number, since 4×1453351645⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453351649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145335160 + ... + 145335169.

It is an arithmetic number, because the mean of its divisors is an integer number (436005495).

Almost surely, 2^1453351645 is an apocalyptic number.

It is an amenable number.

1453351645 is a deficient number, since it is larger than the sum of its proper divisors (290670335).

1453351645 is an equidigital number, since it uses as much as digits as its factorization.

1453351645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290670334.

The product of its digits is 108000, while the sum is 37.

The square root of 1453351645 is about 38122.8493819651. The cubic root of 1453351645 is about 1132.7226084308.

The spelling of 1453351645 in words is "one billion, four hundred fifty-three million, three hundred fifty-one thousand, six hundred forty-five".