7454447509 has 4 divisors (see below), whose sum is σ = 7595097516. Its totient is φ = 7313797504.

The previous prime is 7454447443. The next prime is 7454447557. The reversal of 7454447509 is 9057444547.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9057444547 = 127 ⋅71318461.

It can be written as a sum of positive squares in 2 ways, for example, as 6806745009 + 647702500 = 82503^2 + 25450^2 .

It is a cyclic number.

It is not a de Polignac number, because 7454447509 - 2¹⁷ = 7454316437 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7454447579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70324924 + ... + 70325029.

It is an arithmetic number, because the mean of its divisors is an integer number (1898774379).

Almost surely, 2^7454447509 is an apocalyptic number.

It is an amenable number.

7454447509 is a deficient number, since it is larger than the sum of its proper divisors (140650007).

7454447509 is a wasteful number, since it uses less digits than its factorization.

7454447509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140650006.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The square root of 7454447509 is about 86339.1423920808. The cubic root of 7454447509 is about 1953.4628374930.

The spelling of 7454447509 in words is "seven billion, four hundred fifty-four million, four hundred forty-seven thousand, five hundred nine".